18285680 has 40 divisors (see below), whose sum is σ = 48589152. Its totient is φ = 6269184.

The previous prime is 18285671. The next prime is 18285703. The reversal of 18285680 is 8658281.

It is a tau number, because it is divible by the number of its divisors (40).

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, 15767 + ... + 16886.

Almost surely, 2^18285680 is an apocalyptic number.

18285680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18285680 is an abundant number, since it is smaller than the sum of its proper divisors (30303472).

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

18285680 is a wasteful number, since it uses less digits than its factorization.

18285680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32673 (or 32667 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 18285680 is about 4276.1758616783. The cubic root of 18285680 is about 263.4533377448.

The spelling of 18285680 in words is "eighteen million, two hundred eighty-five thousand, six hundred eighty".