23534220 has 48 divisors (see below), whose sum is σ = 67683168. Its totient is φ = 6105600.

The previous prime is 23534213. The next prime is 23534249. The reversal of 23534220 is 2243532.

It is a super-2 number, since 2×23534220² = 1107719022016800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3081 + ... + 7520.

It is an arithmetic number, because the mean of its divisors is an integer number (1410066).

Almost surely, 2^23534220 is an apocalyptic number.

23534220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23534220 is an abundant number, since it is smaller than the sum of its proper divisors (44148948).

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

23534220 is a wasteful number, since it uses less digits than its factorization.

23534220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10650 (or 10648 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 23534220 is about 4851.2080969589. The cubic root of 23534220 is about 286.5716799653.

Adding to 23534220 its reverse (2243532), we get a palindrome (25777752).

The spelling of 23534220 in words is "twenty-three million, five hundred thirty-four thousand, two hundred twenty".