23364431664 has 180 divisors, whose sum is σ = 72557501112. Its totient is φ = 6459586560.

The previous prime is 23364431641. The next prime is 23364431737. The reversal of 23364431664 is 46613446332.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2255104 + ... + 2265440.

Almost surely, 2^23364431664 is an apocalyptic number.

23364431664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23364431664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36278750556).

23364431664 is an abundant number, since it is smaller than the sum of its proper divisors (49193069448).

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

23364431664 is a wasteful number, since it uses less digits than its factorization.

23364431664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10424 (or 10380 counting only the distinct ones).

The product of its digits is 746496, while the sum is 42.

Adding to 23364431664 its reverse (46613446332), we get a palindrome (69977877996).

The spelling of 23364431664 in words is "twenty-three billion, three hundred sixty-four million, four hundred thirty-one thousand, six hundred sixty-four".