18685960 has 32 divisors (see below), whose sum is σ = 42168600. Its totient is φ = 7452160.

The previous prime is 18685957. The next prime is 18685967. The reversal of 18685960 is 6958681.

It can be written as a sum of positive squares in 4 ways, for example, as 9721924 + 8964036 = 3118^2 + 2994^2 .

It is a super-2 number, since 2×18685960² = 698330202243200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18685967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22350 + ... + 23170.

Almost surely, 2^18685960 is an apocalyptic number.

18685960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18685960 is an abundant number, since it is smaller than the sum of its proper divisors (23482640).

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

18685960 is a wasteful number, since it uses less digits than its factorization.

18685960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401 (or 1397 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 18685960 is about 4322.7259917788. The cubic root of 18685960 is about 265.3618410543.

The spelling of 18685960 in words is "eighteen million, six hundred eighty-five thousand, nine hundred sixty".