18964958 has 4 divisors (see below), whose sum is σ = 28447440. Its totient is φ = 9482478.

The previous prime is 18964951. The next prime is 18964969. The reversal of 18964958 is 85946981.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18964951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4741238 + ... + 4741241.

It is an arithmetic number, because the mean of its divisors is an integer number (7111860).

Almost surely, 2^18964958 is an apocalyptic number.

18964958 is a deficient number, since it is larger than the sum of its proper divisors (9482482).

18964958 is an equidigital number, since it uses as much as digits as its factorization.

18964958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9482481.

The product of its digits is 622080, while the sum is 50.

The square root of 18964958 is about 4354.8774954067. The cubic root of 18964958 is about 266.6760180748.

The spelling of 18964958 in words is "eighteen million, nine hundred sixty-four thousand, nine hundred fifty-eight".