18959680 has 56 divisors (see below), whose sum is σ = 45537120. Its totient is φ = 7518720.

The previous prime is 18959669. The next prime is 18959687. The reversal of 18959680 is 8695981.

It is a self number, because there is not a number n which added to its sum of digits gives 18959680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18959687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57115 + ... + 57445.

Almost surely, 2^18959680 is an apocalyptic number.

18959680 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 18959680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22768560).

18959680 is an abundant number, since it is smaller than the sum of its proper divisors (26577440).

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

18959680 is a wasteful number, since it uses less digits than its factorization.

18959680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 18959680 is about 4354.2714660434. The cubic root of 18959680 is about 266.6512768896.

The spelling of 18959680 in words is "eighteen million, nine hundred fifty-nine thousand, six hundred eighty".