20822662891 has 8 divisors (see below), whose sum is σ = 22056120720. Its totient is φ = 19590160128.

The previous prime is 20822662873. The next prime is 20822662897. The reversal of 20822662891 is 19826622802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20822662891 - 2⁵ = 20822662859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20822662897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193626 + ... + 281311.

It is an arithmetic number, because the mean of its divisors is an integer number (2757015090).

Almost surely, 2^20822662891 is an apocalyptic number.

20822662891 is a deficient number, since it is larger than the sum of its proper divisors (1233457829).

20822662891 is a wasteful number, since it uses less digits than its factorization.

20822662891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477533.

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 20822662891 in words is "twenty billion, eight hundred twenty-two million, six hundred sixty-two thousand, eight hundred ninety-one".