22039999 has 2 divisors, whose sum is σ = 22040000. Its totient is φ = 22039998.

The previous prime is 22039991. The next prime is 22040009. The reversal of 22039999 is 99993022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22039999 - 2³ = 22039991 is a prime.

22039999 is a modest number, since divided by 9999 gives 2203 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22039991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11019999 + 11020000.

It is an arithmetic number, because the mean of its divisors is an integer number (11020000).

Almost surely, 2^22039999 is an apocalyptic number.

22039999 is a deficient number, since it is larger than the sum of its proper divisors (1).

22039999 is an equidigital number, since it uses as much as digits as its factorization.

22039999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 22039999 is about 4694.6777312186. The cubic root of 22039999 is about 280.3736465729.

The spelling of 22039999 in words is "twenty-two million, thirty-nine thousand, nine hundred ninety-nine".