22063813 has 4 divisors (see below), whose sum is σ = 22082220. Its totient is φ = 22045408.

The previous prime is 22063799. The next prime is 22063819. The reversal of 22063813 is 31836022.

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 6563844 + 15499969 = 2562^2 + 3937^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22063813 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 (22063819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7270 + ... + 9847.

It is an arithmetic number, because the mean of its divisors is an integer number (5520555).

Almost surely, 2^22063813 is an apocalyptic number.

It is an amenable number.

22063813 is a deficient number, since it is larger than the sum of its proper divisors (18407).

22063813 is a wasteful number, since it uses less digits than its factorization.

22063813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18406.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 22063813 is about 4697.2133228117. The cubic root of 22063813 is about 280.4745905388.

Adding to 22063813 its reverse (31836022), we get a palindrome (53899835).

The spelling of 22063813 in words is "twenty-two million, sixty-three thousand, eight hundred thirteen".