18680464 has 30 divisors (see below), whose sum is σ = 39786950. Its totient is φ = 8490240.

The previous prime is 18680443. The next prime is 18680503. The reversal of 18680464 is 46408681.

It can be written as a sum of positive squares in only one way, i.e., 12390400 + 6290064 = 3520^2 + 2508^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2889 + ... + 6760.

Almost surely, 2^18680464 is an apocalyptic number.

It is an amenable number.

18680464 is an abundant number, since it is smaller than the sum of its proper divisors (21106486).

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

18680464 is a wasteful number, since it uses less digits than its factorization.

18680464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9679 (or 9662 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 18680464 is about 4322.0902350599. The cubic root of 18680464 is about 265.3358220238.

The spelling of 18680464 in words is "eighteen million, six hundred eighty thousand, four hundred sixty-four".