11981708432 has 20 divisors (see below), whose sum is σ = 23222363376. Its totient is φ = 5988840480.

The previous prime is 11981708407. The next prime is 11981708437. The reversal of 11981708432 is 23480718911.

It is a super-2 number, since 2×11981708432² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11981708437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76178 + ... + 172529.

Almost surely, 2^11981708432 is an apocalyptic number.

It is an amenable number.

11981708432 is a deficient number, since it is larger than the sum of its proper divisors (11240654944).

11981708432 is a wasteful number, since it uses less digits than its factorization.

11981708432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251726 (or 251720 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 44.

The spelling of 11981708432 in words is "eleven billion, nine hundred eighty-one million, seven hundred eight thousand, four hundred thirty-two".