11920504791 has 32 divisors (see below), whose sum is σ = 18800893440. Its totient is φ = 6647439744.

The previous prime is 11920504787. The next prime is 11920504807. The reversal of 11920504791 is 19740502911.

It is not a de Polignac number, because 11920504791 - 2² = 11920504787 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 (11920504721) 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, 332676 + ... + 366761.

It is an arithmetic number, because the mean of its divisors is an integer number (587527920).

Almost surely, 2^11920504791 is an apocalyptic number.

11920504791 is a deficient number, since it is larger than the sum of its proper divisors (6880388649).

11920504791 is a wasteful number, since it uses less digits than its factorization.

11920504791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699495.

The product of its (nonzero) digits is 22680, while the sum is 39.

The spelling of 11920504791 in words is "eleven billion, nine hundred twenty million, five hundred four thousand, seven hundred ninety-one".