23213200520 has 64 divisors (see below), whose sum is σ = 53974771200. Its totient is φ = 8975715840.

The previous prime is 23213200469. The next prime is 23213200529. The reversal of 23213200520 is 2500231232.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 23213200492 and 23213200501.

It is not an unprimeable number, because it can be changed into a prime (23213200529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1151891 + ... + 1171869.

It is an arithmetic number, because the mean of its divisors is an integer number (843355800).

Almost surely, 2^23213200520 is an apocalyptic number.

23213200520 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 23213200520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26987385600).

23213200520 is an abundant number, since it is smaller than the sum of its proper divisors (30761570680).

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

23213200520 is a wasteful number, since it uses less digits than its factorization.

23213200520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20958 (or 20954 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 23213200520 its reverse (2500231232), we get a palindrome (25713431752).

The spelling of 23213200520 in words is "twenty-three billion, two hundred thirteen million, two hundred thousand, five hundred twenty".