23215431418 has 4 divisors (see below), whose sum is σ = 34823147130. Its totient is φ = 11607715708.

The previous prime is 23215431413. The next prime is 23215431433. The reversal of 23215431418 is 81413451232.

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

It can be written as a sum of positive squares in only one way, i.e., 16695999369 + 6519432049 = 129213^2 + 80743^2 .

It is a super-2 number, since 2×23215431418² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23215431413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5803857853 + ... + 5803857856.

Almost surely, 2^23215431418 is an apocalyptic number.

23215431418 is a deficient number, since it is larger than the sum of its proper divisors (11607715712).

23215431418 is a wasteful number, since it uses less digits than its factorization.

23215431418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11607715711.

The product of its digits is 23040, while the sum is 34.

The spelling of 23215431418 in words is "twenty-three billion, two hundred fifteen million, four hundred thirty-one thousand, four hundred eighteen".