13156573420 has 24 divisors (see below), whose sum is σ = 27650062944. Its totient is φ = 5258580096.

The previous prime is 13156573379. The next prime is 13156573511. The reversal of 13156573420 is 2437565131.

It is a self number, because there is not a number n which added to its sum of digits gives 13156573420.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226369 + ... + 278488.

It is an arithmetic number, because the mean of its divisors is an integer number (1152085956).

Almost surely, 2^13156573420 is an apocalyptic number.

13156573420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13156573420 is an abundant number, since it is smaller than the sum of its proper divisors (14493489524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13156573420 is a wasteful number, since it uses less digits than its factorization.

13156573420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506169 (or 506167 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 37.

The spelling of 13156573420 in words is "thirteen billion, one hundred fifty-six million, five hundred seventy-three thousand, four hundred twenty".