23420144 has 20 divisors (see below), whose sum is σ = 49502040. Its totient is φ = 10645440.

The previous prime is 23420123. The next prime is 23420167. The reversal of 23420144 is 44102432.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66359 + ... + 66710.

It is an arithmetic number, because the mean of its divisors is an integer number (2475102).

Almost surely, 2^23420144 is an apocalyptic number.

It is an amenable number.

23420144 is an abundant number, since it is smaller than the sum of its proper divisors (26081896).

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

23420144 is a wasteful number, since it uses less digits than its factorization.

23420144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133088 (or 133082 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 23420144 is about 4839.4363308137. The cubic root of 23420144 is about 286.1079026239.

Adding to 23420144 its reverse (44102432), we get a palindrome (67522576).

The spelling of 23420144 in words is "twenty-three million, four hundred twenty thousand, one hundred forty-four".