18642496 has 28 divisors (see below), whose sum is σ = 38943280. Its totient is φ = 8830080.

The previous prime is 18642493. The next prime is 18642509. The reversal of 18642496 is 69424681.

It is a super-2 number, since 2×18642496² = 695085314220032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18642493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6450 + ... + 8881.

Almost surely, 2^18642496 is an apocalyptic number.

18642496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18642496 is an abundant number, since it is smaller than the sum of its proper divisors (20300784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18642496 is a wasteful number, since it uses less digits than its factorization.

18642496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15362 (or 15352 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 18642496 is about 4317.6956817265. The cubic root of 18642496 is about 265.1559352801.

The spelling of 18642496 in words is "eighteen million, six hundred forty-two thousand, four hundred ninety-six".