23156026213 has 4 divisors (see below), whose sum is σ = 24518145420. Its totient is φ = 21793907008.

The previous prime is 23156026189. The next prime is 23156026219. The reversal of 23156026213 is 31262065132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6558084324 + 16597941889 = 80982^2 + 128833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23156026213 is a prime.

It is a super-3 number, since 3×23156026213³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23156026219) 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, 681059578 + ... + 681059611.

It is an arithmetic number, because the mean of its divisors is an integer number (6129536355).

Almost surely, 2^23156026213 is an apocalyptic number.

It is an amenable number.

23156026213 is a deficient number, since it is larger than the sum of its proper divisors (1362119207).

23156026213 is a wasteful number, since it uses less digits than its factorization.

23156026213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362119206.

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 23156026213 in words is "twenty-three billion, one hundred fifty-six million, twenty-six thousand, two hundred thirteen".