18120954616 has 64 divisors (see below), whose sum is σ = 37298880000. Its totient is φ = 8225728896.

The previous prime is 18120954581. The next prime is 18120954617. The reversal of 18120954616 is 61645902181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18120954617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286045 + ... + 343603.

It is an arithmetic number, because the mean of its divisors is an integer number (582795000).

Almost surely, 2^18120954616 is an apocalyptic number.

It is an amenable number.

18120954616 is an abundant number, since it is smaller than the sum of its proper divisors (19177925384).

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

18120954616 is a wasteful number, since it uses less digits than its factorization.

18120954616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57676 (or 57672 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 18120954616 in words is "eighteen billion, one hundred twenty million, nine hundred fifty-four thousand, six hundred sixteen".