22039813 has 2 divisors, whose sum is σ = 22039814. Its totient is φ = 22039812.

The previous prime is 22039811. The next prime is 22039861. The reversal of 22039813 is 31893022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19210689 + 2829124 = 4383^2 + 1682^2 .

It is a cyclic number.

It is not a de Polignac number, because 22039813 - 2¹ = 22039811 is a prime.

Together with 22039811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22039811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11019906 + 11019907.

It is an arithmetic number, because the mean of its divisors is an integer number (11019907).

Almost surely, 2^22039813 is an apocalyptic number.

It is an amenable number.

22039813 is a deficient number, since it is larger than the sum of its proper divisors (1).

22039813 is an equidigital number, since it uses as much as digits as its factorization.

22039813 is an odious number, because the sum of its binary digits is odd.

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

The square root of 22039813 is about 4694.6579215104. The cubic root of 22039813 is about 280.3728578608.

The spelling of 22039813 in words is "twenty-two million, thirty-nine thousand, eight hundred thirteen".