20022913 has 2 divisors, whose sum is σ = 20022914. Its totient is φ = 20022912.

The previous prime is 20022911. The next prime is 20022943. The reversal of 20022913 is 31922002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17040384 + 2982529 = 4128^2 + 1727^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022913 - 2¹ = 20022911 is a prime.

Together with 20022911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20022911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011456 + 10011457.

It is an arithmetic number, because the mean of its divisors is an integer number (10011457).

Almost surely, 2^20022913 is an apocalyptic number.

It is an amenable number.

20022913 is a deficient number, since it is larger than the sum of its proper divisors (1).

20022913 is an equidigital number, since it uses as much as digits as its factorization.

20022913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 20022913 is about 4474.6969729804. The cubic root of 20022913 is about 271.5453811837.

Adding to 20022913 its reverse (31922002), we get a palindrome (51944915).

The spelling of 20022913 in words is "twenty million, twenty-two thousand, nine hundred thirteen".