23476212561 has 4 divisors (see below), whose sum is σ = 31301616752. Its totient is φ = 15650808372.

The previous prime is 23476212553. The next prime is 23476212587. The reversal of 23476212561 is 16521267432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 23476212561 - 2³ = 23476212553 is a prime.

It is a super-2 number, since 2×23476212561² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23476212061) 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, 3912702091 + ... + 3912702096.

It is an arithmetic number, because the mean of its divisors is an integer number (7825404188).

Almost surely, 2^23476212561 is an apocalyptic number.

It is an amenable number.

23476212561 is a deficient number, since it is larger than the sum of its proper divisors (7825404191).

23476212561 is an equidigital number, since it uses as much as digits as its factorization.

23476212561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7825404190.

The product of its digits is 120960, while the sum is 39.

Adding to 23476212561 its reverse (16521267432), we get a palindrome (39997479993).

The spelling of 23476212561 in words is "twenty-three billion, four hundred seventy-six million, two hundred twelve thousand, five hundred sixty-one".