18914872 has 16 divisors (see below), whose sum is σ = 35746560. Its totient is φ = 9382464.

The previous prime is 18914851. The next prime is 18914893. The reversal of 18914872 is 27841981.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18914851) and next prime (18914893).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8293 + ... + 10324.

It is an arithmetic number, because the mean of its divisors is an integer number (2234160).

Almost surely, 2^18914872 is an apocalyptic number.

It is an amenable number.

18914872 is a deficient number, since it is larger than the sum of its proper divisors (16831688).

18914872 is a wasteful number, since it uses less digits than its factorization.

18914872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18750 (or 18746 counting only the distinct ones).

The product of its digits is 32256, while the sum is 40.

The square root of 18914872 is about 4349.1231300114. The cubic root of 18914872 is about 266.4410494449.

The spelling of 18914872 in words is "eighteen million, nine hundred fourteen thousand, eight hundred seventy-two".