20220021313 has 2 divisors, whose sum is σ = 20220021314. Its totient is φ = 20220021312.

The previous prime is 20220021307. The next prime is 20220021317. The reversal of 20220021313 is 31312002202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14178379329 + 6041641984 = 119073^2 + 77728^2 .

It is a cyclic number.

It is not a de Polignac number, because 20220021313 - 2⁹ = 20220020801 is a prime.

It is not a weakly prime, because it can be changed into another prime (20220021317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110010656 + 10110010657.

It is an arithmetic number, because the mean of its divisors is an integer number (10110010657).

Almost surely, 2^20220021313 is an apocalyptic number.

It is an amenable number.

20220021313 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220021313 is an equidigital number, since it uses as much as digits as its factorization.

20220021313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20220021313 its reverse (31312002202), we get a palindrome (51532023515).

The spelling of 20220021313 in words is "twenty billion, two hundred twenty million, twenty-one thousand, three hundred thirteen".