18485870 has 32 divisors (see below), whose sum is σ = 36523872. Its totient is φ = 6694272.

The previous prime is 18485869. The next prime is 18485881. The reversal of 18485870 is 7858481.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5549 + ... + 8231.

It is an arithmetic number, because the mean of its divisors is an integer number (1141371).

Almost surely, 2^18485870 is an apocalyptic number.

18485870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18485870 is a deficient number, since it is larger than the sum of its proper divisors (18038002).

18485870 is a wasteful number, since it uses less digits than its factorization.

18485870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2756.

The product of its (nonzero) digits is 71680, while the sum is 41.

The square root of 18485870 is about 4299.5197406222. The cubic root of 18485870 is about 264.4112716564.

The spelling of 18485870 in words is "eighteen million, four hundred eighty-five thousand, eight hundred seventy".