18554564 has 24 divisors (see below), whose sum is σ = 39063360. Its totient is φ = 7533216.

The previous prime is 18554563. The next prime is 18554579. The reversal of 18554564 is 46545581.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (18554563) 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, 16907 + ... + 17970.

It is an arithmetic number, because the mean of its divisors is an integer number (1627640).

Almost surely, 2^18554564 is an apocalyptic number.

18554564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18554564 is an abundant number, since it is smaller than the sum of its proper divisors (20508796).

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

18554564 is a wasteful number, since it uses less digits than its factorization.

18554564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34907 (or 34905 counting only the distinct ones).

The product of its digits is 96000, while the sum is 38.

The square root of 18554564 is about 4307.5008995936. The cubic root of 18554564 is about 264.7383866471.

The spelling of 18554564 in words is "eighteen million, five hundred fifty-four thousand, five hundred sixty-four".