23317377720 has 512 divisors, whose sum is σ = 88252416000. Its totient is φ = 4798310400.

The previous prime is 23317377691. The next prime is 23317377731. The reversal of 23317377720 is 2777371332.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 130264591 + ... + 130264769.

It is an arithmetic number, because the mean of its divisors is an integer number (172368000).

Almost surely, 2^23317377720 is an apocalyptic number.

23317377720 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 23317377720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44126208000).

23317377720 is an abundant number, since it is smaller than the sum of its proper divisors (64935038280).

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

23317377720 is a wasteful number, since it uses less digits than its factorization.

23317377720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 259308, while the sum is 42.

The spelling of 23317377720 in words is "twenty-three billion, three hundred seventeen million, three hundred seventy-seven thousand, seven hundred twenty".