20157668872 has 16 divisors (see below), whose sum is σ = 41231595600. Its totient is φ = 9162576720.

The previous prime is 20157668849. The next prime is 20157668891. The reversal of 20157668872 is 27886675102.

It is a super-2 number, since 2×20157668872² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114532122 + ... + 114532297.

It is an arithmetic number, because the mean of its divisors is an integer number (2576974725).

Almost surely, 2^20157668872 is an apocalyptic number.

20157668872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20157668872 is an abundant number, since it is smaller than the sum of its proper divisors (21073926728).

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

20157668872 is a wasteful number, since it uses less digits than its factorization.

20157668872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229064436 (or 229064432 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 52.

The spelling of 20157668872 in words is "twenty billion, one hundred fifty-seven million, six hundred sixty-eight thousand, eight hundred seventy-two".