18996560 has 40 divisors (see below), whose sum is σ = 48184416. Its totient is φ = 6907520.

The previous prime is 18996553. The next prime is 18996563. The reversal of 18996560 is 6569981.

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

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18996563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9914 + ... + 11673.

Almost surely, 2^18996560 is an apocalyptic number.

18996560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18996560 is an abundant number, since it is smaller than the sum of its proper divisors (29187856).

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

18996560 is a wasteful number, since it uses less digits than its factorization.

18996560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21611 (or 21605 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 18996560 is about 4358.5043306162. The cubic root of 18996560 is about 266.8240598622.

The spelling of 18996560 in words is "eighteen million, nine hundred ninety-six thousand, five hundred sixty".