18641264 has 10 divisors (see below), whose sum is σ = 36117480. Its totient is φ = 9320624.

The previous prime is 18641251. The next prime is 18641297. The reversal of 18641264 is 46214681.

It is a super-3 number, since 3×18641264³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18641264.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582524 + ... + 582555.

It is an arithmetic number, because the mean of its divisors is an integer number (3611748).

Almost surely, 2^18641264 is an apocalyptic number.

It is an amenable number.

18641264 is a deficient number, since it is larger than the sum of its proper divisors (17476216).

18641264 is a wasteful number, since it uses less digits than its factorization.

18641264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165087 (or 1165081 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 18641264 is about 4317.5530106763. The cubic root of 18641264 is about 265.1500941576.

The spelling of 18641264 in words is "eighteen million, six hundred forty-one thousand, two hundred sixty-four".