23566420 has 24 divisors (see below), whose sum is σ = 52401384. Its totient is φ = 8871936.

The previous prime is 23566409. The next prime is 23566423. The reversal of 23566420 is 2466532.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12517444 + 11048976 = 3538^2 + 3324^2 .

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23566423) 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, 34317 + ... + 34996.

It is an arithmetic number, because the mean of its divisors is an integer number (2183391).

Almost surely, 2^23566420 is an apocalyptic number.

23566420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23566420 is an abundant number, since it is smaller than the sum of its proper divisors (28834964).

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

23566420 is a wasteful number, since it uses less digits than its factorization.

23566420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69339 (or 69337 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 23566420 is about 4854.5257234873. The cubic root of 23566420 is about 286.7023181428.

The spelling of 23566420 in words is "twenty-three million, five hundred sixty-six thousand, four hundred twenty".