18989760 has 112 divisors (see below), whose sum is σ = 61155072. Its totient is φ = 4992000.

The previous prime is 18989713. The next prime is 18989767. The reversal of 18989760 is 6798981.

It is a happy number.

It is a super-2 number, since 2×18989760² = 721221969715200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (18989767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125685 + ... + 125835.

Almost surely, 2^18989760 is an apocalyptic number.

18989760 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 18989760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30577536).

18989760 is an abundant number, since it is smaller than the sum of its proper divisors (42165312).

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

18989760 is a wasteful number, since it uses less digits than its factorization.

18989760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 18989760 is about 4357.7241766775. The cubic root of 18989760 is about 266.7922186561.

The spelling of 18989760 in words is "eighteen million, nine hundred eighty-nine thousand, seven hundred sixty".