18836956 has 6 divisors (see below), whose sum is σ = 32964680. Its totient is φ = 9418476.

The previous prime is 18836953. The next prime is 18836957. The reversal of 18836956 is 65963881.

It is a super-2 number, since 2×18836956² = 709661822691872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18836953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2354616 + ... + 2354623.

Almost surely, 2^18836956 is an apocalyptic number.

It is an amenable number.

18836956 is a deficient number, since it is larger than the sum of its proper divisors (14127724).

18836956 is a wasteful number, since it uses less digits than its factorization.

18836956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4709243 (or 4709241 counting only the distinct ones).

The product of its digits is 311040, while the sum is 46.

The square root of 18836956 is about 4340.1562183866. The cubic root of 18836956 is about 266.0746958899.

The spelling of 18836956 in words is "eighteen million, eight hundred thirty-six thousand, nine hundred fifty-six".