18413672 has 8 divisors (see below), whose sum is σ = 34525650. Its totient is φ = 9206832.

The previous prime is 18413671. The next prime is 18413683. The reversal of 18413672 is 27631481.

It can be written as a sum of positive squares in only one way, i.e., 10982596 + 7431076 = 3314^2 + 2726^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18413671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1150847 + ... + 1150862.

Almost surely, 2^18413672 is an apocalyptic number.

It is an amenable number.

18413672 is a deficient number, since it is larger than the sum of its proper divisors (16111978).

18413672 is a wasteful number, since it uses less digits than its factorization.

18413672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2301715 (or 2301711 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 18413672 is about 4291.1154726947. The cubic root of 18413672 is about 264.0665962998.

The spelling of 18413672 in words is "eighteen million, four hundred thirteen thousand, six hundred seventy-two".