18957480 has 64 divisors (see below), whose sum is σ = 57196800. Its totient is φ = 5026560.

The previous prime is 18957479. The next prime is 18957481. The reversal of 18957480 is 8475981.

It is an interprime number because it is at equal distance from previous prime (18957479) and next prime (18957481).

It is not an unprimeable number, because it can be changed into a prime (18957481) 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, 28350 + ... + 29010.

It is an arithmetic number, because the mean of its divisors is an integer number (893700).

Almost surely, 2^18957480 is an apocalyptic number.

18957480 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 18957480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28598400).

18957480 is an abundant number, since it is smaller than the sum of its proper divisors (38239320).

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

18957480 is a wasteful number, since it uses less digits than its factorization.

18957480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914 (or 910 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 18957480 is about 4354.0188332160. The cubic root of 18957480 is about 266.6409628003.

The spelling of 18957480 in words is "eighteen million, nine hundred fifty-seven thousand, four hundred eighty".