22013013 has 16 divisors (see below), whose sum is σ = 32256000. Its totient is φ = 13242480.

The previous prime is 22012981. The next prime is 22013021. The reversal of 22013013 is 31031022.

It is a happy number.

It is not a de Polignac number, because 22013013 - 2⁵ = 22012981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22013013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22013063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2188 + ... + 6986.

It is an arithmetic number, because the mean of its divisors is an integer number (2016000).

Almost surely, 2^22013013 is an apocalyptic number.

It is an amenable number.

22013013 is a deficient number, since it is larger than the sum of its proper divisors (10242987).

22013013 is a wasteful number, since it uses less digits than its factorization.

22013013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4952.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 22013013 is about 4691.8027452143. The cubic root of 22013013 is about 280.2591690517.

Adding to 22013013 its reverse (31031022), we get a palindrome (53044035).

Subtracting 22013013 from its reverse (31031022), we obtain a square (9018009 = 3003²).

The spelling of 22013013 in words is "twenty-two million, thirteen thousand, thirteen".