22391764693 has 16 divisors (see below), whose sum is σ = 24533766000. Its totient is φ = 20341844992.

The previous prime is 22391764691. The next prime is 22391764697. The reversal of 22391764693 is 39646719322.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 3473687844 + 18918076849 = 58938^2 + 137543^2 .

It is a cyclic number.

It is not a de Polignac number, because 22391764693 - 2¹ = 22391764691 is a prime.

It is a super-2 number, since 2×22391764693² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22391764693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22391764691) 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, 3146223 + ... + 3153331.

It is an arithmetic number, because the mean of its divisors is an integer number (1533360375).

Almost surely, 2^22391764693 is an apocalyptic number.

It is an amenable number.

22391764693 is a deficient number, since it is larger than the sum of its proper divisors (2142001307).

22391764693 is a wasteful number, since it uses less digits than its factorization.

22391764693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13544.

The product of its digits is 2939328, while the sum is 52.

The spelling of 22391764693 in words is "twenty-two billion, three hundred ninety-one million, seven hundred sixty-four thousand, six hundred ninety-three".