23231420 has 36 divisors (see below), whose sum is σ = 50077272. Its totient is φ = 9052800.

The previous prime is 23231399. The next prime is 23231473. The reversal of 23231420 is 2413232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33275 + ... + 33965.

Almost surely, 2^23231420 is an apocalyptic number.

23231420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23231420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25038636).

23231420 is an abundant number, since it is smaller than the sum of its proper divisors (26845852).

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

23231420 is a wasteful number, since it uses less digits than its factorization.

23231420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782 (or 739 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 23231420 is about 4819.8983391769. The cubic root of 23231420 is about 285.3373250138.

Adding to 23231420 its reverse (2413232), we get a palindrome (25644652).

The spelling of 23231420 in words is "twenty-three million, two hundred thirty-one thousand, four hundred twenty".