23712020 has 12 divisors (see below), whose sum is σ = 49795284. Its totient is φ = 9484800.

The previous prime is 23712001. The next prime is 23712023. The reversal of 23712020 is 2021732.

It can be written as a sum of positive squares in 2 ways, for example, as 14002564 + 9709456 = 3742^2 + 3116^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 23712020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23712023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592781 + ... + 592820.

It is an arithmetic number, because the mean of its divisors is an integer number (4149607).

Almost surely, 2^23712020 is an apocalyptic number.

23712020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23712020 is an abundant number, since it is smaller than the sum of its proper divisors (26083264).

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

23712020 is a wasteful number, since it uses less digits than its factorization.

23712020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185610 (or 1185608 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 23712020 is about 4869.4989475304. The cubic root of 23712020 is about 287.2915489627.

Adding to 23712020 its reverse (2021732), we get a palindrome (25733752).

The spelling of 23712020 in words is "twenty-three million, seven hundred twelve thousand, twenty".