18814634 has 4 divisors (see below), whose sum is σ = 28221954. Its totient is φ = 9407316.

The previous prime is 18814633. The next prime is 18814643. The reversal of 18814634 is 43641881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17598025 + 1216609 = 4195^2 + 1103^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18814594 and 18814603.

It is not an unprimeable number, because it can be changed into a prime (18814633) 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 as a sum of consecutive naturals, namely, 4703657 + ... + 4703660.

Almost surely, 2^18814634 is an apocalyptic number.

18814634 is a deficient number, since it is larger than the sum of its proper divisors (9407320).

18814634 is an equidigital number, since it uses as much as digits as its factorization.

18814634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9407319.

The product of its digits is 18432, while the sum is 35.

The square root of 18814634 is about 4337.5838896787. The cubic root of 18814634 is about 265.9695538673.

The spelling of 18814634 in words is "eighteen million, eight hundred fourteen thousand, six hundred thirty-four".