20113891432 has 32 divisors (see below), whose sum is σ = 37948102920. Its totient is φ = 9994475520.

The previous prime is 20113891393. The next prime is 20113891453. The reversal of 20113891432 is 23419831102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4168768356 + 15945123076 = 64566^2 + 126274^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2569188 + ... + 2577004.

Almost surely, 2^20113891432 is an apocalyptic number.

It is an amenable number.

20113891432 is a deficient number, since it is larger than the sum of its proper divisors (17834211488).

20113891432 is a wasteful number, since it uses less digits than its factorization.

20113891432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9781 (or 9777 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 20113891432 in words is "twenty billion, one hundred thirteen million, eight hundred ninety-one thousand, four hundred thirty-two".