18463444 has 12 divisors (see below), whose sum is σ = 33184564. Its totient is φ = 8982144.

The previous prime is 18463441. The next prime is 18463447. The reversal of 18463444 is 44436481.

It is an interprime number because it is at equal distance from previous prime (18463441) and next prime (18463447).

It can be written as a sum of positive squares in 2 ways, for example, as 17740944 + 722500 = 4212^2 + 850^2 .

It is a super-2 number, since 2×18463444² = 681797528682272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18463441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62229 + ... + 62524.

Almost surely, 2^18463444 is an apocalyptic number.

It is an amenable number.

18463444 is a deficient number, since it is larger than the sum of its proper divisors (14721120).

18463444 is a wasteful number, since it uses less digits than its factorization.

18463444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124794 (or 124792 counting only the distinct ones).

The product of its digits is 36864, while the sum is 34.

The square root of 18463444 is about 4296.9109834857. The cubic root of 18463444 is about 264.3043055133.

The spelling of 18463444 in words is "eighteen million, four hundred sixty-three thousand, four hundred forty-four".