20010199973 has 2 divisors, whose sum is σ = 20010199974. Its totient is φ = 20010199972.

The previous prime is 20010199949. The next prime is 20010200059. The reversal of 20010199973 is 37999101002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16033384129 + 3976815844 = 126623^2 + 63062^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010199973 - 2⁸ = 20010199717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20010199973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20010199933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005099986 + 10005099987.

It is an arithmetic number, because the mean of its divisors is an integer number (10005099987).

Almost surely, 2^20010199973 is an apocalyptic number.

It is an amenable number.

20010199973 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010199973 is an equidigital number, since it uses as much as digits as its factorization.

20010199973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 41.

The spelling of 20010199973 in words is "twenty billion, ten million, one hundred ninety-nine thousand, nine hundred seventy-three".