23420149 has 4 divisors (see below), whose sum is σ = 24053164. Its totient is φ = 22787136.

The previous prime is 23420123. The next prime is 23420167. The reversal of 23420149 is 94102432.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19448100 + 3972049 = 4410^2 + 1993^2 .

It is a cyclic number.

It is not a de Polignac number, because 23420149 - 2⁷ = 23420021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23420119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316452 + ... + 316525.

It is an arithmetic number, because the mean of its divisors is an integer number (6013291).

Almost surely, 2^23420149 is an apocalyptic number.

It is an amenable number.

23420149 is a deficient number, since it is larger than the sum of its proper divisors (633015).

23420149 is an equidigital number, since it uses as much as digits as its factorization.

23420149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633014.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 23420149 is about 4839.4368474028. The cubic root of 23420149 is about 286.1079229844.

The spelling of 23420149 in words is "twenty-three million, four hundred twenty thousand, one hundred forty-nine".