23305320431 has 16 divisors (see below), whose sum is σ = 24793581600. Its totient is φ = 21870645888.

The previous prime is 23305320427. The next prime is 23305320433. The reversal of 23305320431 is 13402350332.

It is a happy number.

It is not a de Polignac number, because 23305320431 - 2² = 23305320427 is a prime.

It is a super-2 number, since 2×23305320431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23305320431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23305320433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93605 + ... + 235313.

It is an arithmetic number, because the mean of its divisors is an integer number (1549598850).

Almost surely, 2^23305320431 is an apocalyptic number.

23305320431 is a deficient number, since it is larger than the sum of its proper divisors (1488261169).

23305320431 is a wasteful number, since it uses less digits than its factorization.

23305320431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141898.

The product of its (nonzero) digits is 6480, while the sum is 26.

Adding to 23305320431 its reverse (13402350332), we get a palindrome (36707670763).

The spelling of 23305320431 in words is "twenty-three billion, three hundred five million, three hundred twenty thousand, four hundred thirty-one".