156020013 has 20 divisors (see below), whose sum is σ = 237024480. Its totient is φ = 102247272.

The previous prime is 156019991. The next prime is 156020057. The reversal of 156020013 is 310020651.

156020013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 156020013 - 2⁶ = 156019949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151020013) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11545 + ... + 21102.

It is an arithmetic number, because the mean of its divisors is an integer number (11851224).

Almost surely, 2^156020013 is an apocalyptic number.

It is an amenable number.

156020013 is a deficient number, since it is larger than the sum of its proper divisors (81004467).

156020013 is an equidigital number, since it uses as much as digits as its factorization.

156020013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32718 (or 32709 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 156020013 is about 12490.7971322890. The cubic root of 156020013 is about 538.3442803599.

Adding to 156020013 its reverse (310020651), we get a palindrome (466040664).

The spelling of 156020013 in words is "one hundred fifty-six million, twenty thousand, thirteen".