11920491816 has 16 divisors (see below), whose sum is σ = 29801229600. Its totient is φ = 3973497264.

The previous prime is 11920491769. The next prime is 11920491881. The reversal of 11920491816 is 61819402911.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248343556 + ... + 248343603.

It is an arithmetic number, because the mean of its divisors is an integer number (1862576850).

Almost surely, 2^11920491816 is an apocalyptic number.

It is an amenable number.

11920491816 is an abundant number, since it is smaller than the sum of its proper divisors (17880737784).

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

11920491816 is a wasteful number, since it uses less digits than its factorization.

11920491816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496687168 (or 496687164 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 42.

The spelling of 11920491816 in words is "eleven billion, nine hundred twenty million, four hundred ninety-one thousand, eight hundred sixteen".