18442680 has 32 divisors (see below), whose sum is σ = 55328400. Its totient is φ = 4918016.

The previous prime is 18442667. The next prime is 18442693. The reversal of 18442680 is 8624481.

It is an interprime number because it is at equal distance from previous prime (18442667) and next prime (18442693).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76725 + ... + 76964.

Almost surely, 2^18442680 is an apocalyptic number.

18442680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18442680 is an abundant number, since it is smaller than the sum of its proper divisors (36885720).

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

18442680 is a wasteful number, since it uses less digits than its factorization.

18442680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153703 (or 153699 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 18442680 is about 4294.4941494896. The cubic root of 18442680 is about 264.2051894227.

The spelling of 18442680 in words is "eighteen million, four hundred forty-two thousand, six hundred eighty".