23115620 has 24 divisors (see below), whose sum is σ = 52956288. Its totient is φ = 8405600.

The previous prime is 23115613. The next prime is 23115629. The reversal of 23115620 is 2651132.

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 = 23115592 and 23115601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23115629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52316 + ... + 52755.

It is an arithmetic number, because the mean of its divisors is an integer number (2206512).

Almost surely, 2^23115620 is an apocalyptic number.

23115620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23115620 is an abundant number, since it is smaller than the sum of its proper divisors (29840668).

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

23115620 is a wasteful number, since it uses less digits than its factorization.

23115620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105091 (or 105089 counting only the distinct ones).

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

The square root of 23115620 is about 4807.8706305391. The cubic root of 23115620 is about 284.8624348926.

Adding to 23115620 its reverse (2651132), we get a palindrome (25766752).

It can be divided in two parts, 231 and 15620, that added together give a palindrome (15851).

The spelling of 23115620 in words is "twenty-three million, one hundred fifteen thousand, six hundred twenty".