23136403864 has 128 divisors (see below), whose sum is σ = 51388416000. Its totient is φ = 9561214080.

The previous prime is 23136403837. The next prime is 23136403877. The reversal of 23136403864 is 46830463132.

It is a super-2 number, since 2×23136403864² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85374049 + ... + 85374319.

It is an arithmetic number, because the mean of its divisors is an integer number (401472000).

Almost surely, 2^23136403864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23136403864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25694208000).

23136403864 is an abundant number, since it is smaller than the sum of its proper divisors (28252012136).

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

23136403864 is a wasteful number, since it uses less digits than its factorization.

23136403864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 40.

Adding to 23136403864 its reverse (46830463132), we get a palindrome (69966866996).

The spelling of 23136403864 in words is "twenty-three billion, one hundred thirty-six million, four hundred three thousand, eight hundred sixty-four".