20654179673 has 2 divisors, whose sum is σ = 20654179674. Its totient is φ = 20654179672.

The previous prime is 20654179643. The next prime is 20654179687. The reversal of 20654179673 is 37697145602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15060934729 + 5593244944 = 122723^2 + 74788^2 .

It is a cyclic number.

It is not a de Polignac number, because 20654179673 - 2⁸ = 20654179417 is a prime.

It is not a weakly prime, because it can be changed into another prime (20654179603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10327089836 + 10327089837.

It is an arithmetic number, because the mean of its divisors is an integer number (10327089837).

Almost surely, 2^20654179673 is an apocalyptic number.

It is an amenable number.

20654179673 is a deficient number, since it is larger than the sum of its proper divisors (1).

20654179673 is an equidigital number, since it uses as much as digits as its factorization.

20654179673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1905120, while the sum is 50.

The spelling of 20654179673 in words is "twenty billion, six hundred fifty-four million, one hundred seventy-nine thousand, six hundred seventy-three".