11900781944 has 32 divisors (see below), whose sum is σ = 22423047600. Its totient is φ = 5921372160.

The previous prime is 11900781943. The next prime is 11900781947. The reversal of 11900781944 is 44918700911.

It is a happy number.

11900781944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11900781944² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11900781895 and 11900781904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11900781943) 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 7 ways as a sum of consecutive naturals, for example, 1524002 + ... + 1531790.

Almost surely, 2^11900781944 is an apocalyptic number.

It is an amenable number.

11900781944 is a deficient number, since it is larger than the sum of its proper divisors (10522265656).

11900781944 is a wasteful number, since it uses less digits than its factorization.

11900781944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8703 (or 8699 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 44.

The spelling of 11900781944 in words is "eleven billion, nine hundred million, seven hundred eighty-one thousand, nine hundred forty-four".