20766422356 has 6 divisors (see below), whose sum is σ = 36341239130. Its totient is φ = 10383211176.

The previous prime is 20766422351. The next prime is 20766422363. The reversal of 20766422356 is 65322466702.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15704099856 + 5062322500 = 125316^2 + 71150^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20766422351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2595802791 + ... + 2595802798.

Almost surely, 2^20766422356 is an apocalyptic number.

It is an amenable number.

20766422356 is a deficient number, since it is larger than the sum of its proper divisors (15574816774).

20766422356 is a wasteful number, since it uses less digits than its factorization.

20766422356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5191605593 (or 5191605591 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 20766422356 in words is "twenty billion, seven hundred sixty-six million, four hundred twenty-two thousand, three hundred fifty-six".