23140520 has 32 divisors (see below), whose sum is σ = 56072520. Its totient is φ = 8544000.

The previous prime is 23140501. The next prime is 23140531. The reversal of 23140520 is 2504132.

It can be written as a sum of positive squares in 4 ways, for example, as 15665764 + 7474756 = 3958^2 + 2734^2 .

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, 21731 + ... + 22770.

Almost surely, 2^23140520 is an apocalyptic number.

23140520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23140520 is an abundant number, since it is smaller than the sum of its proper divisors (32932000).

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

23140520 is a wasteful number, since it uses less digits than its factorization.

23140520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44525 (or 44521 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 23140520 is about 4810.4594375174. The cubic root of 23140520 is about 284.9646821937.

Adding to 23140520 its reverse (2504132), we get a palindrome (25644652).

The spelling of 23140520 in words is "twenty-three million, one hundred forty thousand, five hundred twenty".