23513112020 has 24 divisors (see below), whose sum is σ = 49382688264. Its totient is φ = 9404263296.

The previous prime is 23513112011. The next prime is 23513112067. The reversal of 23513112020 is 2021131532.

It can be written as a sum of positive squares in 4 ways, for example, as 3170365636 + 20342746384 = 56306^2 + 142628^2 .

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 = 23513111983 and 23513112001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153434 + ... + 265646.

It is an arithmetic number, because the mean of its divisors is an integer number (2057612011).

Almost surely, 2^23513112020 is an apocalyptic number.

23513112020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23513112020 is an abundant number, since it is smaller than the sum of its proper divisors (25869576244).

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

23513112020 is a wasteful number, since it uses less digits than its factorization.

23513112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122699 (or 122697 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 23513112020 its reverse (2021131532), we get a palindrome (25534243552).

The spelling of 23513112020 in words is "twenty-three billion, five hundred thirteen million, one hundred twelve thousand, twenty".