18813480 has 64 divisors (see below), whose sum is σ = 64506240. Its totient is φ = 4300032.

The previous prime is 18813479. The next prime is 18813481. The reversal of 18813480 is 8431881.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18813479) and next prime (18813481).

It is not an unprimeable number, because it can be changed into a prime (18813481) 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, 10359 + ... + 12038.

It is an arithmetic number, because the mean of its divisors is an integer number (1007910).

Almost surely, 2^18813480 is an apocalyptic number.

18813480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18813480 is an abundant number, since it is smaller than the sum of its proper divisors (45692760).

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

18813480 is a wasteful number, since it uses less digits than its factorization.

18813480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22418 (or 22414 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 18813480 is about 4337.4508642750. The cubic root of 18813480 is about 265.9641159878.

The spelling of 18813480 in words is "eighteen million, eight hundred thirteen thousand, four hundred eighty".