18401056 has 12 divisors (see below), whose sum is σ = 36227142. Its totient is φ = 9200512.

The previous prime is 18401041. The next prime is 18401057. The reversal of 18401056 is 65010481.

It can be written as a sum of positive squares in only one way, i.e., 18352656 + 48400 = 4284^2 + 220^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18401056.

It is not an unprimeable number, because it can be changed into a prime (18401057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 287485 + ... + 287548.

Almost surely, 2^18401056 is an apocalyptic number.

18401056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18401056 is a deficient number, since it is larger than the sum of its proper divisors (17826086).

18401056 is an equidigital number, since it uses as much as digits as its factorization.

18401056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575043 (or 575035 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 18401056 is about 4289.6452067741. The cubic root of 18401056 is about 264.0062747208.

The spelling of 18401056 in words is "eighteen million, four hundred one thousand, fifty-six".