22404013 has 4 divisors (see below), whose sum is σ = 22575168. Its totient is φ = 22232860.

The previous prime is 22403987. The next prime is 22404061. The reversal of 22404013 is 31040422.

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 a de Polignac number, because none of the positive numbers 2^k-22404013 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 (22404073) 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, 85381 + ... + 85642.

It is an arithmetic number, because the mean of its divisors is an integer number (5643792).

Almost surely, 2^22404013 is an apocalyptic number.

It is an amenable number.

22404013 is a deficient number, since it is larger than the sum of its proper divisors (171155).

22404013 is a wasteful number, since it uses less digits than its factorization.

22404013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171154.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 22404013 is about 4733.2877579965. The cubic root of 22404013 is about 281.9087820928.

Adding to 22404013 its reverse (31040422), we get a palindrome (53444435).

The spelling of 22404013 in words is "twenty-two million, four hundred four thousand, thirteen".