20172333073 has 2 divisors, whose sum is σ = 20172333074. Its totient is φ = 20172333072.

The previous prime is 20172333061. The next prime is 20172333089. The reversal of 20172333073 is 37033327102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13837287424 + 6335045649 = 117632^2 + 79593^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20172333073 is a prime.

It is not a weakly prime, because it can be changed into another prime (20172339073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10086166536 + 10086166537.

It is an arithmetic number, because the mean of its divisors is an integer number (10086166537).

Almost surely, 2^20172333073 is an apocalyptic number.

It is an amenable number.

20172333073 is a deficient number, since it is larger than the sum of its proper divisors (1).

20172333073 is an equidigital number, since it uses as much as digits as its factorization.

20172333073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15876, while the sum is 31.

The spelling of 20172333073 in words is "twenty billion, one hundred seventy-two million, three hundred thirty-three thousand, seventy-three".