20001000073 has 2 divisors, whose sum is σ = 20001000074. Its totient is φ = 20001000072.

The previous prime is 20001000049. The next prime is 20001000083. The reversal of 20001000073 is 37000010002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10001600064 + 9999400009 = 100008^2 + 99997^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001000073 - 2⁹ = 20000999561 is a prime.

It is not a weakly prime, because it can be changed into another prime (20001000013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000500036 + 10000500037.

It is an arithmetic number, because the mean of its divisors is an integer number (10000500037).

Almost surely, 2^20001000073 is an apocalyptic number.

It is an amenable number.

20001000073 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001000073 is an equidigital number, since it uses as much as digits as its factorization.

20001000073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42, while the sum is 13.

Adding to 20001000073 its reverse (37000010002), we get a palindrome (57001010075).

The spelling of 20001000073 in words is "twenty billion, one million, seventy-three", and thus it is an aban number and an uban number.