22021775839 has 4 divisors (see below), whose sum is σ = 25167743824. Its totient is φ = 18875807856.

The previous prime is 22021775837. The next prime is 22021775851. The reversal of 22021775839 is 93857712022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93857712022 = 2 ⋅46928856011.

It is a cyclic number.

It is not a de Polignac number, because 22021775839 - 2¹ = 22021775837 is a prime.

It is a super-2 number, since 2×22021775839² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021775837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1572983982 + ... + 1572983995.

It is an arithmetic number, because the mean of its divisors is an integer number (6291935956).

Almost surely, 2^22021775839 is an apocalyptic number.

22021775839 is a deficient number, since it is larger than the sum of its proper divisors (3145967985).

22021775839 is an equidigital number, since it uses as much as digits as its factorization.

22021775839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145967984.

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 22021775839 in words is "twenty-two billion, twenty-one million, seven hundred seventy-five thousand, eight hundred thirty-nine".