23686718478 has 16 divisors (see below), whose sum is σ = 47861824080. Its totient is φ = 7814174976.

The previous prime is 23686718459. The next prime is 23686718479. The reversal of 23686718478 is 87481768632.

It is a happy number.

It is a super-2 number, since 2×23686718478² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23686718479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20348833 + ... + 20349996.

It is an arithmetic number, because the mean of its divisors is an integer number (2991364005).

Almost surely, 2^23686718478 is an apocalyptic number.

23686718478 is an abundant number, since it is smaller than the sum of its proper divisors (24175105602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23686718478 is a wasteful number, since it uses less digits than its factorization.

23686718478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40698931.

The product of its digits is 21676032, while the sum is 60.

The spelling of 23686718478 in words is "twenty-three billion, six hundred eighty-six million, seven hundred eighteen thousand, four hundred seventy-eight".