18513042951 has 32 divisors (see below), whose sum is σ = 27286398720. Its totient is φ = 11094729984.

The previous prime is 18513042937. The next prime is 18513042967. The reversal of 18513042951 is 15924031581.

It is not a de Polignac number, because 18513042951 - 2¹⁰ = 18513041927 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18513042151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208611 + ... + 283803.

It is an arithmetic number, because the mean of its divisors is an integer number (852699960).

Almost surely, 2^18513042951 is an apocalyptic number.

18513042951 is a deficient number, since it is larger than the sum of its proper divisors (8773355769).

18513042951 is a wasteful number, since it uses less digits than its factorization.

18513042951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75375.

The product of its (nonzero) digits is 43200, while the sum is 39.

The spelling of 18513042951 in words is "eighteen billion, five hundred thirteen million, forty-two thousand, nine hundred fifty-one".