20769077508 has 12 divisors (see below), whose sum is σ = 48461180880. Its totient is φ = 6923025832.

The previous prime is 20769077501. The next prime is 20769077519. The reversal of 20769077508 is 80577096702.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×20769077508² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20769077501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865378218 + ... + 865378241.

It is an arithmetic number, because the mean of its divisors is an integer number (4038431740).

Almost surely, 2^20769077508 is an apocalyptic number.

It is an amenable number.

20769077508 is an abundant number, since it is smaller than the sum of its proper divisors (27692103372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20769077508 is a wasteful number, since it uses less digits than its factorization.

20769077508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1730756466 (or 1730756464 counting only the distinct ones).

The product of its (nonzero) digits is 1481760, while the sum is 51.

The spelling of 20769077508 in words is "twenty billion, seven hundred sixty-nine million, seventy-seven thousand, five hundred eight".