20767666951 has 2 divisors, whose sum is σ = 20767666952. Its totient is φ = 20767666950.

The previous prime is 20767666937. The next prime is 20767666981. The reversal of 20767666951 is 15966676702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20767666951 - 2⁷ = 20767666823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20767666892 and 20767666901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20767666981) 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, 10383833475 + 10383833476.

It is an arithmetic number, because the mean of its divisors is an integer number (10383833476).

Almost surely, 2^20767666951 is an apocalyptic number.

20767666951 is a deficient number, since it is larger than the sum of its proper divisors (1).

20767666951 is an equidigital number, since it uses as much as digits as its factorization.

20767666951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5715360, while the sum is 55.

The spelling of 20767666951 in words is "twenty billion, seven hundred sixty-seven million, six hundred sixty-six thousand, nine hundred fifty-one".