20678701727 has 2 divisors, whose sum is σ = 20678701728. Its totient is φ = 20678701726.

The previous prime is 20678701679. The next prime is 20678701733. The reversal of 20678701727 is 72710787602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20678701727 - 2⁶ = 20678701663 is a prime.

It is a super-2 number, since 2×20678701727² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20678701777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10339350863 + 10339350864.

It is an arithmetic number, because the mean of its divisors is an integer number (10339350864).

Almost surely, 2^20678701727 is an apocalyptic number.

20678701727 is a deficient number, since it is larger than the sum of its proper divisors (1).

20678701727 is an equidigital number, since it uses as much as digits as its factorization.

20678701727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 460992, while the sum is 47.

The spelling of 20678701727 in words is "twenty billion, six hundred seventy-eight million, seven hundred one thousand, seven hundred twenty-seven".