18504959 has 12 divisors (see below), whose sum is σ = 21448248. Its totient is φ = 15830400.

The previous prime is 18504953. The next prime is 18504961. The reversal of 18504959 is 95940581.

It is a happy number.

It is not a de Polignac number, because 18504959 - 2¹² = 18500863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18504953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 269 + ... + 6089.

It is an arithmetic number, because the mean of its divisors is an integer number (1787354).

Almost surely, 2^18504959 is an apocalyptic number.

18504959 is a deficient number, since it is larger than the sum of its proper divisors (2943289).

18504959 is a wasteful number, since it uses less digits than its factorization.

18504959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5866 (or 5849 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 18504959 is about 4301.7390669356. The cubic root of 18504959 is about 264.5022530459.

The spelling of 18504959 in words is "eighteen million, five hundred four thousand, nine hundred fifty-nine".