18623672 has 8 divisors (see below), whose sum is σ = 34919400. Its totient is φ = 9311832.

The previous prime is 18623639. The next prime is 18623699. The reversal of 18623672 is 27632681.

It is a happy number.

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, 1163972 + ... + 1163987.

It is an arithmetic number, because the mean of its divisors is an integer number (4364925).

Almost surely, 2^18623672 is an apocalyptic number.

It is an amenable number.

18623672 is a deficient number, since it is larger than the sum of its proper divisors (16295728).

18623672 is a wasteful number, since it uses less digits than its factorization.

18623672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2327965 (or 2327961 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 18623672 is about 4315.5152647164. The cubic root of 18623672 is about 265.0666593907.

Subtracting 18623672 from its reverse (27632681), we obtain a palindrome (9009009).

The spelling of 18623672 in words is "eighteen million, six hundred twenty-three thousand, six hundred seventy-two".