20790508569 has 16 divisors (see below), whose sum is σ = 28677715968. Its totient is φ = 13387289472.

The previous prime is 20790508553. The next prime is 20790508579. The reversal of 20790508569 is 96580509702.

It is a happy number.

It is not a de Polignac number, because 20790508569 - 2⁴ = 20790508553 is a prime.

It is a super-2 number, since 2×20790508569² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20790508579) 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, 668377 + ... + 698790.

It is an arithmetic number, because the mean of its divisors is an integer number (1792357248).

Almost surely, 2^20790508569 is an apocalyptic number.

It is an amenable number.

20790508569 is a deficient number, since it is larger than the sum of its proper divisors (7887207399).

20790508569 is a wasteful number, since it uses less digits than its factorization.

20790508569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367344.

The product of its (nonzero) digits is 1360800, while the sum is 51.

The spelling of 20790508569 in words is "twenty billion, seven hundred ninety million, five hundred eight thousand, five hundred sixty-nine".