23619421 has 6 divisors (see below), whose sum is σ = 27475710. Its totient is φ = 20245176.

The previous prime is 23619389. The next prime is 23619433. The reversal of 23619421 is 12491632.

It can be written as a sum of positive squares in only one way, i.e., 23328900 + 290521 = 4830^2 + 539^2 .

It is not a de Polignac number, because 23619421 - 2⁵ = 23619389 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 23619421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23619461) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 240966 + ... + 241063.

It is an arithmetic number, because the mean of its divisors is an integer number (4579285).

Almost surely, 2^23619421 is an apocalyptic number.

It is an amenable number.

23619421 is a deficient number, since it is larger than the sum of its proper divisors (3856289).

23619421 is an equidigital number, since it uses as much as digits as its factorization.

23619421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482043 (or 482036 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 23619421 is about 4859.9815843272. The cubic root of 23619421 is about 286.9170888799.

The spelling of 23619421 in words is "twenty-three million, six hundred nineteen thousand, four hundred twenty-one".