23531620 has 24 divisors (see below), whose sum is σ = 56476224. Its totient is φ = 8067936.

The previous prime is 23531617. The next prime is 23531647. The reversal of 23531620 is 2613532.

It is a junction number, because it is equal to n+sod(n) for n = 23531591 and 23531600.

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, 83902 + ... + 84181.

It is an arithmetic number, because the mean of its divisors is an integer number (2353176).

Almost surely, 2^23531620 is an apocalyptic number.

23531620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23531620 is an abundant number, since it is smaller than the sum of its proper divisors (32944604).

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

23531620 is a wasteful number, since it uses less digits than its factorization.

23531620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168099 (or 168097 counting only the distinct ones).

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

The square root of 23531620 is about 4850.9401150705. The cubic root of 23531620 is about 286.5611263430.

The spelling of 23531620 in words is "twenty-three million, five hundred thirty-one thousand, six hundred twenty".