23391420 has 48 divisors (see below), whose sum is σ = 70536480. Its totient is φ = 5757696.

The previous prime is 23391409. The next prime is 23391421. The reversal of 23391420 is 2419332.

23391420 = T₃₂₅ + T₃₂₆ + ... + T₅₅₈.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23391421) 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, 14215 + ... + 15774.

It is an arithmetic number, because the mean of its divisors is an integer number (1469510).

Almost surely, 2^23391420 is an apocalyptic number.

23391420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23391420 is an abundant number, since it is smaller than the sum of its proper divisors (47145060).

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

23391420 is a wasteful number, since it uses less digits than its factorization.

23391420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30014 (or 30012 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 23391420 is about 4836.4677193175. The cubic root of 23391420 is about 285.9908876096.

The spelling of 23391420 in words is "twenty-three million, three hundred ninety-one thousand, four hundred twenty".