20922161671 has 18 divisors (see below), whose sum is σ = 21930475488. Its totient is φ = 19939402080.

The previous prime is 20922161653. The next prime is 20922161683. The reversal of 20922161671 is 17616122902.

It is not a de Polignac number, because 20922161671 - 2⁵ = 20922161639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20922161671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20922161371) 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 17 ways as a sum of consecutive naturals, for example, 66843811 + ... + 66844123.

Almost surely, 2^20922161671 is an apocalyptic number.

20922161671 is a deficient number, since it is larger than the sum of its proper divisors (1008313817).

20922161671 is an frugal number, since it uses more digits than its factorization.

20922161671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 20922161671 in words is "twenty billion, nine hundred twenty-two million, one hundred sixty-one thousand, six hundred seventy-one".