11919749012 has 24 divisors (see below), whose sum is σ = 21613186560. Its totient is φ = 5745206880.

The previous prime is 11919748999. The next prime is 11919749059. The reversal of 11919749012 is 21094791911.

It is a super-2 number, since 2×11919749012² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8228 + ... + 154619.

It is an arithmetic number, because the mean of its divisors is an integer number (900549440).

Almost surely, 2^11919749012 is an apocalyptic number.

It is an amenable number.

11919749012 is a deficient number, since it is larger than the sum of its proper divisors (9693437548).

11919749012 is a wasteful number, since it uses less digits than its factorization.

11919749012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163511 (or 163509 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 44.

The spelling of 11919749012 in words is "eleven billion, nine hundred nineteen million, seven hundred forty-nine thousand, twelve".