23631380 has 18 divisors (see below), whose sum is σ = 49671594. Its totient is φ = 9443856.

The previous prime is 23631379. The next prime is 23631389. The reversal of 23631380 is 8313632.

23631380 = T₃₀₇₂ + T₃₀₇₃ + ... + T₃₀₇₆.

It can be written as a sum of positive squares in only one way, i.e., 18905104 + 4726276 = 4348^2 + 2174^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23631389) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21197 + ... + 22283.

It is an arithmetic number, because the mean of its divisors is an integer number (2759533).

Almost surely, 2^23631380 is an apocalyptic number.

23631380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23631380 is an abundant number, since it is smaller than the sum of its proper divisors (26040214).

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

23631380 is an equidigital number, since it uses as much as digits as its factorization.

23631380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183 (or 1094 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 23631380 is about 4861.2117830845. The cubic root of 23631380 is about 286.9655047227.

The spelling of 23631380 in words is "twenty-three million, six hundred thirty-one thousand, three hundred eighty".