18870958840 has 64 divisors (see below), whose sum is σ = 45452016000. Its totient is φ = 7029878400.

The previous prime is 18870958837. The next prime is 18870958907. The reversal of 18870958840 is 4885907881.

It is a super-2 number, since 2×18870958840² (a number of 21 digits) contains 22 as substring.

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, 165586 + ... + 255265.

It is an arithmetic number, because the mean of its divisors is an integer number (710187750).

Almost surely, 2^18870958840 is an apocalyptic number.

18870958840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18870958840 is an abundant number, since it is smaller than the sum of its proper divisors (26581057160).

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

18870958840 is a wasteful number, since it uses less digits than its factorization.

18870958840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420940 (or 420936 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 58.

The spelling of 18870958840 in words is "eighteen billion, eight hundred seventy million, nine hundred fifty-eight thousand, eight hundred forty".