15420113291 has 6 divisors (see below), whose sum is σ = 16822391076. Its totient is φ = 14017910400.

The previous prime is 15420113287. The next prime is 15420113297. The reversal of 15420113291 is 19231102451.

It is not a de Polignac number, because 15420113291 - 2² = 15420113287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15420113297) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 393131 + ... + 430571.

It is an arithmetic number, because the mean of its divisors is an integer number (2803731846).

Almost surely, 2^15420113291 is an apocalyptic number.

15420113291 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

15420113291 is a deficient number, since it is larger than the sum of its proper divisors (1402277785).

15420113291 is an frugal number, since it uses more digits than its factorization.

15420113291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74893 (or 37452 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The spelling of 15420113291 in words is "fifteen billion, four hundred twenty million, one hundred thirteen thousand, two hundred ninety-one".