18946680 has 32 divisors (see below), whose sum is σ = 56840400. Its totient is φ = 5052416.

The previous prime is 18946679. The next prime is 18946693. The reversal of 18946680 is 8664981.

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, 78825 + ... + 79064.

Almost surely, 2^18946680 is an apocalyptic number.

18946680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18946680 is an abundant number, since it is smaller than the sum of its proper divisors (37893720).

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

18946680 is a wasteful number, since it uses less digits than its factorization.

18946680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157903 (or 157899 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 18946680 is about 4352.7784230305. The cubic root of 18946680 is about 266.5903184209.

The spelling of 18946680 in words is "eighteen million, nine hundred forty-six thousand, six hundred eighty".