20650158769 has 18 divisors (see below), whose sum is σ = 21537034790. Its totient is φ = 19799418240.

The previous prime is 20650158703. The next prime is 20650158779. The reversal of 20650158769 is 96785105602.

It can be written as a sum of positive squares in 3 ways, for example, as 3261780544 + 17388378225 = 57112^2 + 131865^2 .

It is not a de Polignac number, because 20650158769 - 2⁹ = 20650158257 is a prime.

It is a super-2 number, since 2×20650158769² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20650158779) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5849797 + ... + 5853325.

Almost surely, 2^20650158769 is an apocalyptic number.

It is an amenable number.

20650158769 is a deficient number, since it is larger than the sum of its proper divisors (886876021).

20650158769 is an frugal number, since it uses more digits than its factorization.

20650158769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729 (or 3629 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 49.

The spelling of 20650158769 in words is "twenty billion, six hundred fifty million, one hundred fifty-eight thousand, seven hundred sixty-nine".