18990576 has 120 divisors (see below), whose sum is σ = 61127040. Its totient is φ = 5443200.

The previous prime is 18990541. The next prime is 18990599. The reversal of 18990576 is 67509981.

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 23 ways as a sum of consecutive naturals, for example, 29781 + ... + 30411.

It is an arithmetic number, because the mean of its divisors is an integer number (509392).

Almost surely, 2^18990576 is an apocalyptic number.

18990576 is a gapful number since it is divisible by the number (16) 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 18990576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30563520).

18990576 is an abundant number, since it is smaller than the sum of its proper divisors (42136464).

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

18990576 is a wasteful number, since it uses less digits than its factorization.

18990576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675 (or 666 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 18990576 is about 4357.8178025246. The cubic root of 18990576 is about 266.7960400022.

It can be divided in two parts, 189905 and 76, that added together give a palindrome (189981).

The spelling of 18990576 in words is "eighteen million, nine hundred ninety thousand, five hundred seventy-six".