20022791171 has 4 divisors (see below), whose sum is σ = 20180451072. Its totient is φ = 19865131272.

The previous prime is 20022791167. The next prime is 20022791209. The reversal of 20022791171 is 17119722002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20022791171 - 2² = 20022791167 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20022791111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78829760 + ... + 78830013.

It is an arithmetic number, because the mean of its divisors is an integer number (5045112768).

Almost surely, 2^20022791171 is an apocalyptic number.

20022791171 is a deficient number, since it is larger than the sum of its proper divisors (157659901).

20022791171 is a wasteful number, since it uses less digits than its factorization.

20022791171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157659900.

The product of its (nonzero) digits is 3528, while the sum is 32.

The spelling of 20022791171 in words is "twenty billion, twenty-two million, seven hundred ninety-one thousand, one hundred seventy-one".