22216657994 has 16 divisors (see below), whose sum is σ = 33443317320. Its totient is φ = 11068911360.

The previous prime is 22216657993. The next prime is 22216658039. The reversal of 22216657994 is 49975661222.

It can be written as a sum of positive squares in 4 ways, for example, as 13901589025 + 8315068969 = 117905^2 + 91187^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22216657993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2663222 + ... + 2671550.

Almost surely, 2^22216657994 is an apocalyptic number.

22216657994 is a deficient number, since it is larger than the sum of its proper divisors (11226659326).

22216657994 is a wasteful number, since it uses less digits than its factorization.

22216657994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12905.

The product of its digits is 3265920, while the sum is 53.

The spelling of 22216657994 in words is "twenty-two billion, two hundred sixteen million, six hundred fifty-seven thousand, nine hundred ninety-four".