13256156020 has 12 divisors (see below), whose sum is σ = 27837927684. Its totient is φ = 5302462400.

The previous prime is 13256155993. The next prime is 13256156021. The reversal of 13256156020 is 2065165231.

It can be written as a sum of positive squares in 2 ways, for example, as 8844273936 + 4411882084 = 94044^2 + 66422^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13256156021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331403881 + ... + 331403920.

It is an arithmetic number, because the mean of its divisors is an integer number (2319827307).

Almost surely, 2^13256156020 is an apocalyptic number.

13256156020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13256156020 is an abundant number, since it is smaller than the sum of its proper divisors (14581771664).

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

13256156020 is a wasteful number, since it uses less digits than its factorization.

13256156020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662807810 (or 662807808 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 13256156020 in words is "thirteen billion, two hundred fifty-six million, one hundred fifty-six thousand, twenty".