13915421992 has 16 divisors (see below), whose sum is σ = 26519145300. Its totient is φ = 6843649920.

The previous prime is 13915421983. The next prime is 13915421999. The reversal of 13915421992 is 29912451931.

It can be written as a sum of positive squares in 2 ways, for example, as 11158541956 + 2756880036 = 105634^2 + 52506^2 .

It is not an unprimeable number, because it can be changed into a prime (13915421999) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 14257117 + ... + 14258092.

Almost surely, 2^13915421992 is an apocalyptic number.

It is an amenable number.

13915421992 is a deficient number, since it is larger than the sum of its proper divisors (12603723308).

13915421992 is a wasteful number, since it uses less digits than its factorization.

13915421992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28515276 (or 28515272 counting only the distinct ones).

The product of its digits is 174960, while the sum is 46.

The spelling of 13915421992 in words is "thirteen billion, nine hundred fifteen million, four hundred twenty-one thousand, nine hundred ninety-two".