22023013 has 4 divisors (see below), whose sum is σ = 22384108. Its totient is φ = 21661920.

The previous prime is 22022999. The next prime is 22023019. The reversal of 22023013 is 31032022.

It is a happy number.

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 10510564 + 11512449 = 3242^2 + 3393^2 .

It is a cyclic number.

It is not a de Polignac number, because 22023013 - 2⁵ = 22022981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22022984 and 22023002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22023019) 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, 180456 + ... + 180577.

It is an arithmetic number, because the mean of its divisors is an integer number (5596027).

Almost surely, 2^22023013 is an apocalyptic number.

It is an amenable number.

22023013 is a deficient number, since it is larger than the sum of its proper divisors (361095).

22023013 is an equidigital number, since it uses as much as digits as its factorization.

22023013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361094.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 22023013 is about 4692.8683126634. The cubic root of 22023013 is about 280.3016010352.

Adding to 22023013 its reverse (31032022), we get a palindrome (53055035).

Subtracting 22023013 from its reverse (31032022), we obtain a palindrome (9009009).

The spelling of 22023013 in words is "twenty-two million, twenty-three thousand, thirteen".