23428013 has 4 divisors (see below), whose sum is σ = 26774880. Its totient is φ = 20081148.

The previous prime is 23428001. The next prime is 23428019. The reversal of 23428013 is 31082432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23428013 - 2⁴ = 23427997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23428013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23428019) 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, 1673423 + ... + 1673436.

It is an arithmetic number, because the mean of its divisors is an integer number (6693720).

Almost surely, 2^23428013 is an apocalyptic number.

It is an amenable number.

23428013 is a deficient number, since it is larger than the sum of its proper divisors (3346867).

23428013 is an equidigital number, since it uses as much as digits as its factorization.

23428013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3346866.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 23428013 is about 4840.2492704405. The cubic root of 23428013 is about 286.1399424352.

The spelling of 23428013 in words is "twenty-three million, four hundred twenty-eight thousand, thirteen".