20021127073 has 2 divisors, whose sum is σ = 20021127074. Its totient is φ = 20021127072.

The previous prime is 20021127047. The next prime is 20021127151. The reversal of 20021127073 is 37072112002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19119145984 + 901981089 = 138272^2 + 30033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20021127073 is a prime.

It is not a weakly prime, because it can be changed into another prime (20021127023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010563536 + 10010563537.

It is an arithmetic number, because the mean of its divisors is an integer number (10010563537).

Almost surely, 2^20021127073 is an apocalyptic number.

It is an amenable number.

20021127073 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021127073 is an equidigital number, since it uses as much as digits as its factorization.

20021127073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1176, while the sum is 25.

Adding to 20021127073 its reverse (37072112002), we get a palindrome (57093239075).

The spelling of 20021127073 in words is "twenty billion, twenty-one million, one hundred twenty-seven thousand, seventy-three".