18884872 has 8 divisors (see below), whose sum is σ = 35409150. Its totient is φ = 9442432.

The previous prime is 18884851. The next prime is 18884891. The reversal of 18884872 is 27848881.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18267076 + 617796 = 4274^2 + 786^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1180297 + ... + 1180312.

Almost surely, 2^18884872 is an apocalyptic number.

It is an amenable number.

18884872 is a deficient number, since it is larger than the sum of its proper divisors (16524278).

18884872 is a wasteful number, since it uses less digits than its factorization.

18884872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360615 (or 2360611 counting only the distinct ones).

The product of its digits is 229376, while the sum is 46.

The square root of 18884872 is about 4345.6727902593. The cubic root of 18884872 is about 266.3001116490.

The spelling of 18884872 in words is "eighteen million, eight hundred eighty-four thousand, eight hundred seventy-two".