18930560 has 64 divisors (see below), whose sum is σ = 49388400. Its totient is φ = 6881280.

The previous prime is 18930539. The next prime is 18930577. The reversal of 18930560 is 6503981.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×18930560² = 716732203827200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 5696 + ... + 8384.

Almost surely, 2^18930560 is an apocalyptic number.

18930560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18930560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24694200).

18930560 is an abundant number, since it is smaller than the sum of its proper divisors (30457840).

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

18930560 is a wasteful number, since it uses less digits than its factorization.

18930560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2719 (or 2707 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 18930560 is about 4350.9263381492. The cubic root of 18930560 is about 266.5146911822.

The spelling of 18930560 in words is "eighteen million, nine hundred thirty thousand, five hundred sixty".