18604634 has 16 divisors (see below), whose sum is σ = 28766760. Its totient is φ = 9020160.

The previous prime is 18604633. The next prime is 18604661. The reversal of 18604634 is 43640681.

It can be written as a sum of positive squares in 4 ways, for example, as 15171025 + 3433609 = 3895^2 + 1853^2 .

It is a super-2 number, since 2×18604634² = 692264812547912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18604634.

It is not an unprimeable number, because it can be changed into a prime (18604633) 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 7 ways as a sum of consecutive naturals, for example, 7862 + ... + 9950.

Almost surely, 2^18604634 is an apocalyptic number.

18604634 is a deficient number, since it is larger than the sum of its proper divisors (10162126).

18604634 is a wasteful number, since it uses less digits than its factorization.

18604634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 18604634 is about 4313.3089386224. The cubic root of 18604634 is about 264.9763073632.

The spelling of 18604634 in words is "eighteen million, six hundred four thousand, six hundred thirty-four".