23253540 has 48 divisors (see below), whose sum is σ = 66631488. Its totient is φ = 6056064.

The previous prime is 23253523. The next prime is 23253541. The reversal of 23253540 is 4535232.

It is a self number, because there is not a number n which added to its sum of digits gives 23253540.

It is not an unprimeable number, because it can be changed into a prime (23253541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1927 + ... + 7086.

It is an arithmetic number, because the mean of its divisors is an integer number (1388156).

Almost surely, 2^23253540 is an apocalyptic number.

23253540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23253540 is an abundant number, since it is smaller than the sum of its proper divisors (43377948).

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

23253540 is a wasteful number, since it uses less digits than its factorization.

23253540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9068 (or 9066 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 23253540 is about 4822.1924474247. The cubic root of 23253540 is about 285.4278584301.

Adding to 23253540 its reverse (4535232), we get a palindrome (27788772).

The spelling of 23253540 in words is "twenty-three million, two hundred fifty-three thousand, five hundred forty".