18712470 has 32 divisors (see below), whose sum is σ = 51326208. Its totient is φ = 4277088.

The previous prime is 18712469. The next prime is 18712471. The reversal of 18712470 is 7421781.

It is an interprime number because it is at equal distance from previous prime (18712469) and next prime (18712471).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18712471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44344 + ... + 44763.

It is an arithmetic number, because the mean of its divisors is an integer number (1603944).

Almost surely, 2^18712470 is an apocalyptic number.

18712470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18712470 is an abundant number, since it is smaller than the sum of its proper divisors (32613738).

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

18712470 is a wasteful number, since it uses less digits than its factorization.

18712470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89124.

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 18712470 is about 4325.7912570997. The cubic root of 18712470 is about 265.4872724525.

The spelling of 18712470 in words is "eighteen million, seven hundred twelve thousand, four hundred seventy".