18406870 has 16 divisors (see below), whose sum is σ = 34201728. Its totient is φ = 7125120.

The previous prime is 18406859. The next prime is 18406897. The reversal of 18406870 is 7860481.

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, 29379 + ... + 29998.

It is an arithmetic number, because the mean of its divisors is an integer number (2137608).

Almost surely, 2^18406870 is an apocalyptic number.

18406870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18406870 is a deficient number, since it is larger than the sum of its proper divisors (15794858).

18406870 is a wasteful number, since it uses less digits than its factorization.

18406870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59415.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 18406870 is about 4290.3228316760. The cubic root of 18406870 is about 264.0340769449.

The spelling of 18406870 in words is "eighteen million, four hundred six thousand, eight hundred seventy".