18445568 has 18 divisors (see below), whose sum is σ = 36819594. Its totient is φ = 9222656.

The previous prime is 18445547. The next prime is 18445571. The reversal of 18445568 is 86554481.

It can be written as a sum of positive squares in only one way, i.e., 12054784 + 6390784 = 3472^2 + 2528^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35771 + ... + 36282.

It is an arithmetic number, because the mean of its divisors is an integer number (2045533).

Almost surely, 2^18445568 is an apocalyptic number.

It is an amenable number.

18445568 is a deficient number, since it is larger than the sum of its proper divisors (18374026).

18445568 is an frugal number, since it uses more digits than its factorization.

18445568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72069 (or 72055 counting only the distinct ones).

The product of its digits is 153600, while the sum is 41.

The square root of 18445568 is about 4294.8303808183. The cubic root of 18445568 is about 264.2189796232.

It can be divided in two parts, 18 and 445568, that multiplied together give a square (8020224 = 2832²).

The spelling of 18445568 in words is "eighteen million, four hundred forty-five thousand, five hundred sixty-eight".