23666513240 has 64 divisors (see below), whose sum is σ = 56222208000. Its totient is φ = 8941173120.

The previous prime is 23666513177. The next prime is 23666513257. The reversal of 23666513240 is 4231566632.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 23666513194 and 23666513203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204521 + ... + 298599.

It is an arithmetic number, because the mean of its divisors is an integer number (878472000).

Almost surely, 2^23666513240 is an apocalyptic number.

23666513240 is a gapful number since it is divisible by the number (20) 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 23666513240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28111104000).

23666513240 is an abundant number, since it is smaller than the sum of its proper divisors (32555694760).

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

23666513240 is a wasteful number, since it uses less digits than its factorization.

23666513240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94440 (or 94436 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 38.

The spelling of 23666513240 in words is "twenty-three billion, six hundred sixty-six million, five hundred thirteen thousand, two hundred forty".