20023213057 has 2 divisors, whose sum is σ = 20023213058. Its totient is φ = 20023213056.

The previous prime is 20023213043. The next prime is 20023213157. The reversal of 20023213057 is 75031232002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19975864896 + 47348161 = 141336^2 + 6881^2 .

It is a cyclic number.

It is not a de Polignac number, because 20023213057 - 2¹⁹ = 20022688769 is a prime.

It is a super-2 number, since 2×20023213057² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20023213157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011606528 + 10011606529.

It is an arithmetic number, because the mean of its divisors is an integer number (10011606529).

Almost surely, 2^20023213057 is an apocalyptic number.

It is an amenable number.

20023213057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20023213057 is an equidigital number, since it uses as much as digits as its factorization.

20023213057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 25.

Adding to 20023213057 its reverse (75031232002), we get a palindrome (95054445059).

The spelling of 20023213057 in words is "twenty billion, twenty-three million, two hundred thirteen thousand, fifty-seven".