23418720 has 240 divisors, whose sum is σ = 89646480. Its totient is φ = 5723136.

The previous prime is 23418709. The next prime is 23418721. The reversal of 23418720 is 2781432.

It is a tau number, because it is divible by the number of its divisors (240).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23418721) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 168411 + ... + 168549.

It is an arithmetic number, because the mean of its divisors is an integer number (373527).

Almost surely, 2^23418720 is an apocalyptic number.

23418720 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 23418720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44823240).

23418720 is an abundant number, since it is smaller than the sum of its proper divisors (66227760).

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

23418720 is a wasteful number, since it uses less digits than its factorization.

23418720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 23418720 is about 4839.2892040051. The cubic root of 23418720 is about 286.1021038279.

The spelling of 23418720 in words is "twenty-three million, four hundred eighteen thousand, seven hundred twenty".