18472744 has 16 divisors (see below), whose sum is σ = 36674100. Its totient is φ = 8692992.

The previous prime is 18472733. The next prime is 18472763. The reversal of 18472744 is 44727481.

It can be written as a sum of positive squares in 2 ways, for example, as 18404100 + 68644 = 4290^2 + 262^2 .

It is a super-3 number, since 3×18472744³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67779 + ... + 68050.

Almost surely, 2^18472744 is an apocalyptic number.

It is an amenable number.

18472744 is a deficient number, since it is larger than the sum of its proper divisors (18201356).

18472744 is a wasteful number, since it uses less digits than its factorization.

18472744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135852 (or 135848 counting only the distinct ones).

The product of its digits is 50176, while the sum is 37.

The square root of 18472744 is about 4297.9930200036. The cubic root of 18472744 is about 264.3486745821.

The spelling of 18472744 in words is "eighteen million, four hundred seventy-two thousand, seven hundred forty-four".