23315620 has 24 divisors (see below), whose sum is σ = 49795200. Its totient is φ = 9167712.

The previous prime is 23315609. The next prime is 23315639. The reversal of 23315620 is 2651332.

It is a junction number, because it is equal to n+sod(n) for n = 23315591 and 23315600.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8700 + ... + 11059.

It is an arithmetic number, because the mean of its divisors is an integer number (2074800).

Almost surely, 2^23315620 is an apocalyptic number.

23315620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23315620 is an abundant number, since it is smaller than the sum of its proper divisors (26479580).

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

23315620 is a wasteful number, since it uses less digits than its factorization.

23315620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19827 (or 19825 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 23315620 is about 4828.6250631003. The cubic root of 23315620 is about 285.6816350784.

Adding to 23315620 its reverse (2651332), we get a palindrome (25966952).

The spelling of 23315620 in words is "twenty-three million, three hundred fifteen thousand, six hundred twenty".