22605899 has 2 divisors, whose sum is σ = 22605900. Its totient is φ = 22605898.

The previous prime is 22605857. The next prime is 22605901. The reversal of 22605899 is 99850622.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22605899 - 2²⁰ = 21557323 is a prime.

It is a super-2 number, since 2×22605899² = 1022053339196402, which contains 22 as substring.

Together with 22605901, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22607899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11302949 + 11302950.

It is an arithmetic number, because the mean of its divisors is an integer number (11302950).

Almost surely, 2^22605899 is an apocalyptic number.

22605899 is a deficient number, since it is larger than the sum of its proper divisors (1).

22605899 is an equidigital number, since it uses as much as digits as its factorization.

22605899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 22605899 is about 4754.5661211093. The cubic root of 22605899 is about 282.7530257139.

The spelling of 22605899 in words is "twenty-two million, six hundred five thousand, eight hundred ninety-nine".