20682891967 has 2 divisors, whose sum is σ = 20682891968. Its totient is φ = 20682891966.

The previous prime is 20682891913. The next prime is 20682892001. The reversal of 20682891967 is 76919828602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20682891967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20682811967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10341445983 + 10341445984.

It is an arithmetic number, because the mean of its divisors is an integer number (10341445984).

Almost surely, 2^20682891967 is an apocalyptic number.

20682891967 is a deficient number, since it is larger than the sum of its proper divisors (1).

20682891967 is an equidigital number, since it uses as much as digits as its factorization.

20682891967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The spelling of 20682891967 in words is "twenty billion, six hundred eighty-two million, eight hundred ninety-one thousand, nine hundred sixty-seven".