22442167821 has 16 divisors (see below), whose sum is σ = 31574724480. Its totient is φ = 14150146560.

The previous prime is 22442167819. The next prime is 22442167829. The reversal of 22442167821 is 12876124422.

It is not a de Polignac number, because 22442167821 - 2¹ = 22442167819 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22442167821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22442167829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1821100 + ... + 1833381.

It is an arithmetic number, because the mean of its divisors is an integer number (1973420280).

Almost surely, 2^22442167821 is an apocalyptic number.

It is an amenable number.

22442167821 is a deficient number, since it is larger than the sum of its proper divisors (9132556659).

22442167821 is a wasteful number, since it uses less digits than its factorization.

22442167821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3654596.

The product of its digits is 86016, while the sum is 39.

The spelling of 22442167821 in words is "twenty-two billion, four hundred forty-two million, one hundred sixty-seven thousand, eight hundred twenty-one".