18764936 has 8 divisors (see below), whose sum is σ = 35184270. Its totient is φ = 9382464.

The previous prime is 18764929. The next prime is 18764953. The reversal of 18764936 is 63946781.

It can be written as a sum of positive squares in only one way, i.e., 15132100 + 3632836 = 3890^2 + 1906^2 .

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 polite number, since it can be written as a sum of consecutive naturals, namely, 1172801 + ... + 1172816.

Almost surely, 2^18764936 is an apocalyptic number.

It is an amenable number.

18764936 is a deficient number, since it is larger than the sum of its proper divisors (16419334).

18764936 is a wasteful number, since it uses less digits than its factorization.

18764936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345623 (or 2345619 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 18764936 is about 4331.8513363226. The cubic root of 18764936 is about 265.7351652104.

The spelling of 18764936 in words is "eighteen million, seven hundred sixty-four thousand, nine hundred thirty-six".