18514720 has 96 divisors (see below), whose sum is σ = 50996736. Its totient is φ = 6220800.

The previous prime is 18514703. The next prime is 18514733. The reversal of 18514720 is 2741581.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68185 + ... + 68455.

It is an arithmetic number, because the mean of its divisors is an integer number (531216).

Almost surely, 2^18514720 is an apocalyptic number.

18514720 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 18514720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25498368).

18514720 is an abundant number, since it is smaller than the sum of its proper divisors (32482016).

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

18514720 is a wasteful number, since it uses less digits than its factorization.

18514720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 18514720 is about 4302.8734585158. The cubic root of 18514720 is about 264.5487514409.

The spelling of 18514720 in words is "eighteen million, five hundred fourteen thousand, seven hundred twenty".