18902994 has 32 divisors (see below), whose sum is σ = 42577920. Its totient is φ = 5542800.

The previous prime is 18902993. The next prime is 18903011. The reversal of 18902994 is 49920981.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (18902993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2574 + ... + 6665.

It is an arithmetic number, because the mean of its divisors is an integer number (1330560).

Almost surely, 2^18902994 is an apocalyptic number.

18902994 is an abundant number, since it is smaller than the sum of its proper divisors (23674926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18902994 is a wasteful number, since it uses less digits than its factorization.

18902994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9286.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 18902994 is about 4347.7573529350. The cubic root of 18902994 is about 266.3852653070.

It can be divided in two parts, 1890 and 2994, that added together give a palindrome (4884).

The spelling of 18902994 in words is "eighteen million, nine hundred two thousand, nine hundred ninety-four".