18271492 has 6 divisors (see below), whose sum is σ = 31975118. Its totient is φ = 9135744.

The previous prime is 18271489. The next prime is 18271501. The reversal of 18271492 is 29417281.

It can be written as a sum of positive squares in only one way, i.e., 15634116 + 2637376 = 3954^2 + 1624^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2283933 + ... + 2283940.

Almost surely, 2^18271492 is an apocalyptic number.

It is an amenable number.

18271492 is a deficient number, since it is larger than the sum of its proper divisors (13703626).

18271492 is a wasteful number, since it uses less digits than its factorization.

18271492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4567877 (or 4567875 counting only the distinct ones).

The product of its digits is 8064, while the sum is 34.

The square root of 18271492 is about 4274.5165808545. The cubic root of 18271492 is about 263.3851816226.

The spelling of 18271492 in words is "eighteen million, two hundred seventy-one thousand, four hundred ninety-two".