18313936 has 10 divisors (see below), whose sum is σ = 35483282. Its totient is φ = 9156960.

The previous prime is 18313907. The next prime is 18313949. The reversal of 18313936 is 63931381.

It can be written as a sum of positive squares in only one way, i.e., 16353936 + 1960000 = 4044^2 + 1400^2 .

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, 572295 + ... + 572326.

Almost surely, 2^18313936 is an apocalyptic number.

18313936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18313936 is a deficient number, since it is larger than the sum of its proper divisors (17169346).

18313936 is a wasteful number, since it uses less digits than its factorization.

18313936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144629 (or 1144623 counting only the distinct ones).

The product of its digits is 11664, while the sum is 34.

The square root of 18313936 is about 4279.4784728983. The cubic root of 18313936 is about 263.5889685853.

The spelling of 18313936 in words is "eighteen million, three hundred thirteen thousand, nine hundred thirty-six".