18816956 has 6 divisors (see below), whose sum is σ = 32929680. Its totient is φ = 9408476.

The previous prime is 18816923. The next prime is 18816983. The reversal of 18816956 is 65961881.

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, 2352116 + ... + 2352123.

It is an arithmetic number, because the mean of its divisors is an integer number (5488280).

Almost surely, 2^18816956 is an apocalyptic number.

It is an amenable number.

18816956 is a deficient number, since it is larger than the sum of its proper divisors (14112724).

18816956 is a wasteful number, since it uses less digits than its factorization.

18816956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4704243 (or 4704241 counting only the distinct ones).

The product of its digits is 103680, while the sum is 44.

The square root of 18816956 is about 4337.8515419502. The cubic root of 18816956 is about 265.9804949234.

The spelling of 18816956 in words is "eighteen million, eight hundred sixteen thousand, nine hundred fifty-six".