18145560 has 32 divisors (see below), whose sum is σ = 54437040. Its totient is φ = 4838784.

The previous prime is 18145529. The next prime is 18145637. The reversal of 18145560 is 6554181.

It is a super-2 number, since 2×18145560² = 658522695427200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75487 + ... + 75726.

Almost surely, 2^18145560 is an apocalyptic number.

18145560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18145560 is an abundant number, since it is smaller than the sum of its proper divisors (36291480).

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

18145560 is a wasteful number, since it uses less digits than its factorization.

18145560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151227 (or 151223 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 18145560 is about 4259.7605566510. The cubic root of 18145560 is about 262.7786790966.

The spelling of 18145560 in words is "eighteen million, one hundred forty-five thousand, five hundred sixty".