18940560 has 40 divisors (see below), whose sum is σ = 58716480. Its totient is φ = 5050752.

The previous prime is 18940553. The next prime is 18940573. The reversal of 18940560 is 6504981.

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

It is a super-2 number, since 2×18940560² = 717489626227200, which contains 22 as substring.

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, 39220 + ... + 39699.

It is an arithmetic number, because the mean of its divisors is an integer number (1467912).

Almost surely, 2^18940560 is an apocalyptic number.

18940560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18940560 is an abundant number, since it is smaller than the sum of its proper divisors (39775920).

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

18940560 is a wasteful number, since it uses less digits than its factorization.

18940560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78935 (or 78929 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 18940560 is about 4352.0753669945. The cubic root of 18940560 is about 266.5616113959.

The spelling of 18940560 in words is "eighteen million, nine hundred forty thousand, five hundred sixty".