18422568 has 24 divisors (see below), whose sum is σ = 49894650. Its totient is φ = 6140832.

The previous prime is 18422567. The next prime is 18422617. The reversal of 18422568 is 86522481.

It can be written as a sum of positive squares in only one way, i.e., 15539364 + 2883204 = 3942^2 + 1698^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18422567) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 127863 + ... + 128006.

Almost surely, 2^18422568 is an apocalyptic number.

18422568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18422568 is an abundant number, since it is smaller than the sum of its proper divisors (31472082).

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

18422568 is a wasteful number, since it uses less digits than its factorization.

18422568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255881 (or 255874 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 18422568 is about 4292.1519078430. The cubic root of 18422568 is about 264.1091146749.

The spelling of 18422568 in words is "eighteen million, four hundred twenty-two thousand, five hundred sixty-eight".