18750916 has 12 divisors (see below), whose sum is σ = 33054588. Its totient is φ = 9306752.

The previous prime is 18750913. The next prime is 18750917. The reversal of 18750916 is 61905781.

It can be written as a sum of positive squares in 2 ways, for example, as 15178816 + 3572100 = 3896^2 + 1890^2 .

It is not an unprimeable number, because it can be changed into a prime (18750913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16561 + ... + 17656.

It is an arithmetic number, because the mean of its divisors is an integer number (2754549).

Almost surely, 2^18750916 is an apocalyptic number.

It is an amenable number.

18750916 is a deficient number, since it is larger than the sum of its proper divisors (14303672).

18750916 is a wasteful number, since it uses less digits than its factorization.

18750916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34358 (or 34356 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 18750916 is about 4330.2327881997. The cubic root of 18750916 is about 265.6689684263.

The spelling of 18750916 in words is "eighteen million, seven hundred fifty thousand, nine hundred sixteen".