23447420 has 24 divisors (see below), whose sum is σ = 52136784. Its totient is φ = 8827136.

The previous prime is 23447401. The next prime is 23447423. The reversal of 23447420 is 2474432.

It is a self number, because there is not a number n which added to its sum of digits gives 23447420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23447423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34142 + ... + 34821.

It is an arithmetic number, because the mean of its divisors is an integer number (2172366).

Almost surely, 2^23447420 is an apocalyptic number.

23447420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23447420 is an abundant number, since it is smaller than the sum of its proper divisors (28689364).

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

23447420 is a wasteful number, since it uses less digits than its factorization.

23447420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68989 (or 68987 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 23447420 is about 4842.2536075675. The cubic root of 23447420 is about 286.2189302866.

The spelling of 23447420 in words is "twenty-three million, four hundred forty-seven thousand, four hundred twenty".