18870860 has 12 divisors (see below), whose sum is σ = 39628848. Its totient is φ = 7548336.

The previous prime is 18870853. The next prime is 18870871. The reversal of 18870860 is 6807881.

It is a super-2 number, since 2×18870860² = 712218714279200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471752 + ... + 471791.

It is an arithmetic number, because the mean of its divisors is an integer number (3302404).

Almost surely, 2^18870860 is an apocalyptic number.

18870860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18870860 is an abundant number, since it is smaller than the sum of its proper divisors (20757988).

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

18870860 is a wasteful number, since it uses less digits than its factorization.

18870860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943552 (or 943550 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 18870860 is about 4344.0603126568. The cubic root of 18870860 is about 266.2342331616.

The spelling of 18870860 in words is "eighteen million, eight hundred seventy thousand, eight hundred sixty".