23447920 has 20 divisors (see below), whose sum is σ = 54516600. Its totient is φ = 9379136.

The previous prime is 23447917. The next prime is 23447933. The reversal of 23447920 is 2974432.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146470 + ... + 146629.

It is an arithmetic number, because the mean of its divisors is an integer number (2725830).

Almost surely, 2^23447920 is an apocalyptic number.

23447920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23447920 is an abundant number, since it is smaller than the sum of its proper divisors (31068680).

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

23447920 is a wasteful number, since it uses less digits than its factorization.

23447920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293112 (or 293106 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 23447920 is about 4842.3052361453. The cubic root of 23447920 is about 286.2209647456.

The spelling of 23447920 in words is "twenty-three million, four hundred forty-seven thousand, nine hundred twenty".