20822066091 has 64 divisors (see below), whose sum is σ = 32893286400. Its totient is φ = 12992918400.

The previous prime is 20822066087. The next prime is 20822066093. The reversal of 20822066091 is 19066022802.

It is a happy number.

20822066091 is a `hidden beast` number, since 20 + 8 + 2 + 20 + 6 + 609 + 1 = 666.

It is not a de Polignac number, because 20822066091 - 2² = 20822066087 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20822066093) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9008826 + ... + 9011136.

It is an arithmetic number, because the mean of its divisors is an integer number (513957600).

Almost surely, 2^20822066091 is an apocalyptic number.

20822066091 is a deficient number, since it is larger than the sum of its proper divisors (12071220309).

20822066091 is a wasteful number, since it uses less digits than its factorization.

20822066091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697 (or 2691 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

Adding to 20822066091 its reverse (19066022802), we get a palindrome (39888088893).

The spelling of 20822066091 in words is "twenty billion, eight hundred twenty-two million, sixty-six thousand, ninety-one".