20022971 has 2 divisors, whose sum is σ = 20022972. Its totient is φ = 20022970.

The previous prime is 20022943. The next prime is 20023001. The reversal of 20022971 is 17922002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20022971 - 2²² = 15828667 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20022901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011485 + 10011486.

It is an arithmetic number, because the mean of its divisors is an integer number (10011486).

Almost surely, 2^20022971 is an apocalyptic number.

20022971 is a deficient number, since it is larger than the sum of its proper divisors (1).

20022971 is an equidigital number, since it uses as much as digits as its factorization.

20022971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 20022971 is about 4474.7034538615. The cubic root of 20022971 is about 271.5456433770.

Adding to 20022971 its reverse (17922002), we get a palindrome (37944973).

The spelling of 20022971 in words is "twenty million, twenty-two thousand, nine hundred seventy-one".