18149572 has 12 divisors (see below), whose sum is σ = 36299200. Its totient is φ = 7778376.

The previous prime is 18149543. The next prime is 18149581. The reversal of 18149572 is 27594181.

18149572 is an admirable 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, 324072 + ... + 324127.

Almost surely, 2^18149572 is an apocalyptic number.

It is an amenable number.

18149572 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18149572 is a wasteful number, since it uses less digits than its factorization.

18149572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648210 (or 648208 counting only the distinct ones).

The product of its digits is 20160, while the sum is 37.

The square root of 18149572 is about 4260.2314491117. The cubic root of 18149572 is about 262.7980445386.

It can be divided in two parts, 18149 and 572, that added together give a triangular number (18721 = T₁₉₃).

The spelling of 18149572 in words is "eighteen million, one hundred forty-nine thousand, five hundred seventy-two".