22065819 has 4 divisors (see below), whose sum is σ = 29421096. Its totient is φ = 14710544.

The previous prime is 22065817. The next prime is 22065829. The reversal of 22065819 is 91856022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22065819 - 2¹ = 22065817 is a prime.

It is a super-2 number, since 2×22065819² = 973800736281522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22065819.

It is not an unprimeable number, because it can be changed into a prime (22065811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3677634 + ... + 3677639.

It is an arithmetic number, because the mean of its divisors is an integer number (7355274).

Almost surely, 2^22065819 is an apocalyptic number.

22065819 is a deficient number, since it is larger than the sum of its proper divisors (7355277).

22065819 is an equidigital number, since it uses as much as digits as its factorization.

22065819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7355276.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 22065819 is about 4697.4268488184. The cubic root of 22065819 is about 280.4830903536.

The spelling of 22065819 in words is "twenty-two million, sixty-five thousand, eight hundred nineteen".