15920320432 has 10 divisors (see below), whose sum is σ = 30845620868. Its totient is φ = 7960160208.

The previous prime is 15920320421. The next prime is 15920320439. The reversal of 15920320432 is 23402302951.

It is a junction number, because it is equal to n+sod(n) for n = 15920320394 and 15920320403.

It is not an unprimeable number, because it can be changed into a prime (15920320439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497509998 + ... + 497510029.

Almost surely, 2^15920320432 is an apocalyptic number.

It is an amenable number.

15920320432 is a deficient number, since it is larger than the sum of its proper divisors (14925300436).

15920320432 is an equidigital number, since it uses as much as digits as its factorization.

15920320432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995020035 (or 995020029 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 15920320432 in words is "fifteen billion, nine hundred twenty million, three hundred twenty thousand, four hundred thirty-two".