18990960 has 80 divisors (see below), whose sum is σ = 60022944. Its totient is φ = 4965376.

The previous prime is 18990943. The next prime is 18990973. The reversal of 18990960 is 6909981.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11974 + ... + 13466.

Almost surely, 2^18990960 is an apocalyptic number.

18990960 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 18990960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30011472).

18990960 is an abundant number, since it is smaller than the sum of its proper divisors (41031984).

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

18990960 is a wasteful number, since it uses less digits than its factorization.

18990960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562 (or 1556 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 18990960 is about 4357.8618610507. The cubic root of 18990960 is about 266.7978382448.

The spelling of 18990960 in words is "eighteen million, nine hundred ninety thousand, nine hundred sixty".