23720900 has 108 divisors (see below), whose sum is σ = 61746048. Its totient is φ = 7882560.

The previous prime is 23720861. The next prime is 23720909. The reversal of 23720900 is 902732.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23720909) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 230249 + ... + 230351.

Almost surely, 2^23720900 is an apocalyptic number.

23720900 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 23720900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30873024).

23720900 is an abundant number, since it is smaller than the sum of its proper divisors (38025148).

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

23720900 is a wasteful number, since it uses less digits than its factorization.

23720900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 23720900 is about 4870.4106603037. The cubic root of 23720900 is about 287.3274074367.

The spelling of 23720900 in words is "twenty-three million, seven hundred twenty thousand, nine hundred".