18971087960 has 64 divisors (see below), whose sum is σ = 47017601280. Its totient is φ = 6831584640.

The previous prime is 18971087929. The next prime is 18971087977. The reversal of 18971087960 is 6978017981.

It is a junction number, because it is equal to n+sod(n) for n = 18971087896 and 18971087905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163982 + ... + 254621.

It is an arithmetic number, because the mean of its divisors is an integer number (734650020).

Almost surely, 2^18971087960 is an apocalyptic number.

18971087960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18971087960 is an abundant number, since it is smaller than the sum of its proper divisors (28046513320).

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

18971087960 is a wasteful number, since it uses less digits than its factorization.

18971087960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418728 (or 418724 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 56.

The spelling of 18971087960 in words is "eighteen billion, nine hundred seventy-one million, eighty-seven thousand, nine hundred sixty".