20294731673 has 2 divisors, whose sum is σ = 20294731674. Its totient is φ = 20294731672.

The previous prime is 20294731621. The next prime is 20294731729. The reversal of 20294731673 is 37613749202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16365573184 + 3929158489 = 127928^2 + 62683^2 .

It is a cyclic number.

It is not a de Polignac number, because 20294731673 - 2⁸ = 20294731417 is a prime.

It is a super-2 number, since 2×20294731673² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20294736673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10147365836 + 10147365837.

It is an arithmetic number, because the mean of its divisors is an integer number (10147365837).

Almost surely, 2^20294731673 is an apocalyptic number.

It is an amenable number.

20294731673 is a deficient number, since it is larger than the sum of its proper divisors (1).

20294731673 is an equidigital number, since it uses as much as digits as its factorization.

20294731673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 44.

The spelling of 20294731673 in words is "twenty billion, two hundred ninety-four million, seven hundred thirty-one thousand, six hundred seventy-three".