20187523916 has 36 divisors (see below), whose sum is σ = 41409793656. Its totient is φ = 8585740800.

The previous prime is 20187523799. The next prime is 20187523927. The reversal of 20187523916 is 61932578102.

It is a super-2 number, since 2×20187523916² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 367445 + ... + 418796.

It is an arithmetic number, because the mean of its divisors is an integer number (1150272046).

Almost surely, 2^20187523916 is an apocalyptic number.

It is an amenable number.

20187523916 is an abundant number, since it is smaller than the sum of its proper divisors (21222269740).

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

20187523916 is a wasteful number, since it uses less digits than its factorization.

20187523916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786390 (or 786381 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 20187523916 in words is "twenty billion, one hundred eighty-seven million, five hundred twenty-three thousand, nine hundred sixteen".