23404020 has 24 divisors (see below), whose sum is σ = 65531424. Its totient is φ = 6241056.

The previous prime is 23404009. The next prime is 23404021. The reversal of 23404020 is 2040432.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23404021) 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, 194974 + ... + 195093.

It is an arithmetic number, because the mean of its divisors is an integer number (2730476).

Almost surely, 2^23404020 is an apocalyptic number.

23404020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23404020 is an abundant number, since it is smaller than the sum of its proper divisors (42127404).

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

23404020 is a wasteful number, since it uses less digits than its factorization.

23404020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390079 (or 390077 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 23404020 is about 4837.7701474956. The cubic root of 23404020 is about 286.0422289186.

Adding to 23404020 its reverse (2040432), we get a palindrome (25444452).

The spelling of 23404020 in words is "twenty-three million, four hundred four thousand, twenty".