18631996 has 6 divisors (see below), whose sum is σ = 32606000. Its totient is φ = 9315996.

The previous prime is 18631993. The next prime is 18631997. The reversal of 18631996 is 69913681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18631993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2328996 + ... + 2329003.

Almost surely, 2^18631996 is an apocalyptic number.

It is an amenable number.

18631996 is a deficient number, since it is larger than the sum of its proper divisors (13974004).

18631996 is a wasteful number, since it uses less digits than its factorization.

18631996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4658003 (or 4658001 counting only the distinct ones).

The product of its digits is 69984, while the sum is 43.

The square root of 18631996 is about 4316.4795841055. The cubic root of 18631996 is about 265.1061447337.

The spelling of 18631996 in words is "eighteen million, six hundred thirty-one thousand, nine hundred ninety-six".