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20177082031 = 251357122511
BaseRepresentation
bin10010110010101001…
…011101011010101111
31221002011201222010111
4102302221131122233
5312310313111111
613134052520451
71313002240021
oct226251353257
957064658114
1020177082031
118614489407
123ab1320127
131b972995c2
14d95a20011
157d1599a21
hex4b2a5d6af

20177082031 has 8 divisors (see below), whose sum is σ = 20264041728. Its totient is φ = 20090175000.

The previous prime is 20177082011. The next prime is 20177082047. The reversal of 20177082031 is 13028077102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20177082031 is a prime.

It is a super-2 number, since 2×201770820312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20177081984 and 20177082002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20177082011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 885066 + ... + 907576.

It is an arithmetic number, because the mean of its divisors is an integer number (2533005216).

Almost surely, 220177082031 is an apocalyptic number.

20177082031 is a deficient number, since it is larger than the sum of its proper divisors (86959697).

20177082031 is a wasteful number, since it uses less digits than its factorization.

20177082031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26333.

The product of its (nonzero) digits is 4704, while the sum is 31.

The spelling of 20177082031 in words is "twenty billion, one hundred seventy-seven million, eighty-two thousand, thirty-one".

Divisors: 1 251 3571 22511 896321 5650261 80386781 20177082031