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29991677954 = 27192322921407
BaseRepresentation
bin11011111011101001…
…001011000000000010
32212102011122002200012
4123323221023000002
5442410332143304
621440013424522
72111136025220
oct337351130002
985364562605
1029991677954
11117a057a607
12599019b142
132a9c740204
1416472bdb10
15ba803316e
hex6fba4b002

29991677954 has 64 divisors (see below), whose sum is σ = 56722636800. Its totient is φ = 11596229568.

The previous prime is 29991677951. The next prime is 29991677957. The reversal of 29991677954 is 45977619992.

It is an interprime number because it is at equal distance from previous prime (29991677951) and next prime (29991677957).

It is a super-2 number, since 2×299916779542 (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (29991677951) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1390319 + ... + 1411725.

It is an arithmetic number, because the mean of its divisors is an integer number (886291200).

Almost surely, 229991677954 is an apocalyptic number.

29991677954 is a deficient number, since it is larger than the sum of its proper divisors (26730958846).

29991677954 is a wasteful number, since it uses less digits than its factorization.

29991677954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21687.

The product of its digits is 77157360, while the sum is 68.

The spelling of 29991677954 in words is "twenty-nine billion, nine hundred ninety-one million, six hundred seventy-seven thousand, nine hundred fifty-four".

Divisors: 1 2 7 14 19 23 38 46 133 161 229 266 322 437 458 874 1603 3059 3206 4351 5267 6118 8702 10534 21407 30457 36869 42814 60914 73738 100073 149849 200146 299698 406733 492361 700511 813466 984722 1401022 2847131 3446527 4902203 5694262 6893054 9354859 9804406 18709718 34315421 65484013 68630842 93141857 112750669 130968026 186283714 225501338 651992999 789254683 1303985998 1578509366 2142262711 4284525422 14995838977 29991677954