20658224321971 has 2 divisors, whose sum is σ = 20658224321972. Its totient is φ = 20658224321970.

The previous prime is 20658224321951. The next prime is 20658224321989. The reversal of 20658224321971 is 17912342285602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20658224321971 - 2⁵ = 20658224321939 is a prime.

It is not a weakly prime, because it can be changed into another prime (20658224321921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10329112160985 + 10329112160986.

It is an arithmetic number, because the mean of its divisors is an integer number (10329112160986).

It is a 1-persistent number, because it is pandigital, but 2⋅20658224321971 = 41316448643942 is not.

Almost surely, 2^{20658224321971} is an apocalyptic number.

20658224321971 is a deficient number, since it is larger than the sum of its proper divisors (1).

20658224321971 is an equidigital number, since it uses as much as digits as its factorization.

20658224321971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 20658224321971 in words is "twenty trillion, six hundred fifty-eight billion, two hundred twenty-four million, three hundred twenty-one thousand, nine hundred seventy-one".