20772026808 has 64 divisors (see below), whose sum is σ = 56093923200. Its totient is φ = 6372051840.

The previous prime is 20772026801. The next prime is 20772026837. The reversal of 20772026808 is 80862027702.

It is a self number, because there is not a number n which added to its sum of digits gives 20772026808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20772026801) 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, 2703 + ... + 203841.

It is an arithmetic number, because the mean of its divisors is an integer number (876467550).

Almost surely, 2^20772026808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20772026808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28046961600).

20772026808 is an abundant number, since it is smaller than the sum of its proper divisors (35321896392).

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

20772026808 is a wasteful number, since it uses less digits than its factorization.

20772026808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201492 (or 201488 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The spelling of 20772026808 in words is "twenty billion, seven hundred seventy-two million, twenty-six thousand, eight hundred eight".