18712870 has 32 divisors (see below), whose sum is σ = 36930816. Its totient is φ = 6770400.

The previous prime is 18712867. The next prime is 18712877. The reversal of 18712870 is 7821781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18712877) by changing a digit.

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, 33937 + ... + 34483.

It is an arithmetic number, because the mean of its divisors is an integer number (1154088).

Almost surely, 2^18712870 is an apocalyptic number.

18712870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18712870 is a deficient number, since it is larger than the sum of its proper divisors (18217946).

18712870 is a wasteful number, since it uses less digits than its factorization.

18712870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876.

The product of its (nonzero) digits is 6272, while the sum is 34.

The square root of 18712870 is about 4325.8374911686. The cubic root of 18712870 is about 265.4891641349.

The spelling of 18712870 in words is "eighteen million, seven hundred twelve thousand, eight hundred seventy".