20089779673 has 2 divisors, whose sum is σ = 20089779674. Its totient is φ = 20089779672.

The previous prime is 20089779659. The next prime is 20089779791. The reversal of 20089779673 is 37697798002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18485937369 + 1603842304 = 135963^2 + 40048^2 .

It is a cyclic number.

It is not a de Polignac number, because 20089779673 - 2⁵ = 20089779641 is a prime.

It is not a weakly prime, because it can be changed into another prime (20089779613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10044889836 + 10044889837.

It is an arithmetic number, because the mean of its divisors is an integer number (10044889837).

Almost surely, 2^20089779673 is an apocalyptic number.

It is an amenable number.

20089779673 is a deficient number, since it is larger than the sum of its proper divisors (1).

20089779673 is an equidigital number, since it uses as much as digits as its factorization.

20089779673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8001504, while the sum is 58.

The spelling of 20089779673 in words is "twenty billion, eighty-nine million, seven hundred seventy-nine thousand, six hundred seventy-three".