18500870 has 16 divisors (see below), whose sum is σ = 35054640. Its totient is φ = 7010784.

The previous prime is 18500863. The next prime is 18500887. The reversal of 18500870 is 7800581.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48497 + ... + 48876.

It is an arithmetic number, because the mean of its divisors is an integer number (2190915).

Almost surely, 2^18500870 is an apocalyptic number.

18500870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18500870 is a deficient number, since it is larger than the sum of its proper divisors (16553770).

18500870 is a wasteful number, since it uses less digits than its factorization.

18500870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97399.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 18500870 is about 4301.2637677780. The cubic root of 18500870 is about 264.4827694508.

The spelling of 18500870 in words is "eighteen million, five hundred thousand, eight hundred seventy".