23220536 has 16 divisors (see below), whose sum is σ = 43872840. Its totient is φ = 11521120.

The previous prime is 23220529. The next prime is 23220551. The reversal of 23220536 is 63502232.

23220536 = T₁₂₈ + T₁₂₉ + ... + T₅₂₀.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10031 + ... + 12126.

Almost surely, 2^23220536 is an apocalyptic number.

It is an amenable number.

23220536 is a deficient number, since it is larger than the sum of its proper divisors (20652304).

23220536 is a wasteful number, since it uses less digits than its factorization.

23220536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22294 (or 22290 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 23220536 is about 4818.7691374458. The cubic root of 23220536 is about 285.2927575477.

Adding to 23220536 its reverse (63502232), we get a palindrome (86722768).

The spelling of 23220536 in words is "twenty-three million, two hundred twenty thousand, five hundred thirty-six".