23423420 has 24 divisors (see below), whose sum is σ = 49490784. Its totient is φ = 9311936.

The previous prime is 23423417. The next prime is 23423429. The reversal of 23423420 is 2432432.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 23423392 and 23423401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23423429) 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, 167 + ... + 6846.

It is an arithmetic number, because the mean of its divisors is an integer number (2062116).

Almost surely, 2^23423420 is an apocalyptic number.

23423420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23423420 is an abundant number, since it is smaller than the sum of its proper divisors (26067364).

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

23423420 is a wasteful number, since it uses less digits than its factorization.

23423420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7189 (or 7187 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 23423420 is about 4839.7747881487. The cubic root of 23423420 is about 286.1212422201.

Adding to 23423420 its reverse (2432432), we get a palindrome (25855852).

The spelling of 23423420 in words is "twenty-three million, four hundred twenty-three thousand, four hundred twenty".