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13005023660 = 2251374746359
BaseRepresentation
bin11000001110010100…
…01110100110101100
31020120100020122121222
430013022032212230
5203113241224120
65550250442512
7640163606606
oct140712164654
936510218558
1013005023660
115573aa6842
12262b433438
1312c3440495
148b52b6176
15511ae5525
hex30728e9ac

13005023660 has 24 divisors (see below), whose sum is σ = 27509902560. Its totient is φ = 5164037504.

The previous prime is 13005023641. The next prime is 13005023701. The reversal of 13005023660 is 6632050031.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2370440 + ... + 2375919.

It is an arithmetic number, because the mean of its divisors is an integer number (1146245940).

Almost surely, 213005023660 is an apocalyptic number.

13005023660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13005023660 is an abundant number, since it is smaller than the sum of its proper divisors (14504878900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13005023660 is a wasteful number, since it uses less digits than its factorization.

13005023660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4746505 (or 4746503 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 13005023660 its reverse (6632050031), we get a palindrome (19637073691).

The spelling of 13005023660 in words is "thirteen billion, five million, twenty-three thousand, six hundred sixty".

Divisors: 1 2 4 5 10 20 137 274 548 685 1370 2740 4746359 9492718 18985436 23731795 47463590 94927180 650251183 1300502366 2601004732 3251255915 6502511830 13005023660