18331672 has 8 divisors (see below), whose sum is σ = 34371900. Its totient is φ = 9165832.

The previous prime is 18331657. The next prime is 18331697. The reversal of 18331672 is 27613381.

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

It is a congruent number.

It is an unprimeable number.

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, 1145722 + ... + 1145737.

Almost surely, 2^18331672 is an apocalyptic number.

It is an amenable number.

18331672 is a deficient number, since it is larger than the sum of its proper divisors (16040228).

18331672 is a wasteful number, since it uses less digits than its factorization.

18331672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291465 (or 2291461 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The square root of 18331672 is about 4281.5501865563. The cubic root of 18331672 is about 263.6740314139.

The spelling of 18331672 in words is "eighteen million, three hundred thirty-one thousand, six hundred seventy-two".