20858733677 has 2 divisors, whose sum is σ = 20858733678. Its totient is φ = 20858733676.

The previous prime is 20858733667. The next prime is 20858733697. The reversal of 20858733677 is 77633785802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16012624681 + 4846108996 = 126541^2 + 69614^2 .

It is a cyclic number.

It is not a de Polignac number, because 20858733677 - 2¹⁴ = 20858717293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20858733607) 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, 10429366838 + 10429366839.

It is an arithmetic number, because the mean of its divisors is an integer number (10429366839).

Almost surely, 2^20858733677 is an apocalyptic number.

It is an amenable number.

20858733677 is a deficient number, since it is larger than the sum of its proper divisors (1).

20858733677 is an equidigital number, since it uses as much as digits as its factorization.

20858733677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11854080, while the sum is 56.

The spelling of 20858733677 in words is "twenty billion, eight hundred fifty-eight million, seven hundred thirty-three thousand, six hundred seventy-seven".