20350021273 has 2 divisors, whose sum is σ = 20350021274. Its totient is φ = 20350021272.

The previous prime is 20350021261. The next prime is 20350021301. The reversal of 20350021273 is 37212005302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20185873929 + 164147344 = 142077^2 + 12812^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20350021273 is a prime.

It is not a weakly prime, because it can be changed into another prime (20350021873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10175010636 + 10175010637.

It is an arithmetic number, because the mean of its divisors is an integer number (10175010637).

Almost surely, 2^20350021273 is an apocalyptic number.

It is an amenable number.

20350021273 is a deficient number, since it is larger than the sum of its proper divisors (1).

20350021273 is an equidigital number, since it uses as much as digits as its factorization.

20350021273 is an evil number, because the sum of its binary digits is even.

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

Adding to 20350021273 its reverse (37212005302), we get a palindrome (57562026575).

The spelling of 20350021273 in words is "twenty billion, three hundred fifty million, twenty-one thousand, two hundred seventy-three".