20774001664463 has 2 divisors, whose sum is σ = 20774001664464. Its totient is φ = 20774001664462.

The previous prime is 20774001664457. The next prime is 20774001664501. The reversal of 20774001664463 is 36446610047702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20774001664463 - 2¹⁴ = 20774001648079 is a prime.

It is a super-2 number, since 2×20774001664463² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20774001664763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10387000832231 + 10387000832232.

It is an arithmetic number, because the mean of its divisors is an integer number (10387000832232).

Almost surely, 2^{20774001664463} is an apocalyptic number.

20774001664463 is a deficient number, since it is larger than the sum of its proper divisors (1).

20774001664463 is an equidigital number, since it uses as much as digits as its factorization.

20774001664463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4064256, while the sum is 50.

The spelling of 20774001664463 in words is "twenty trillion, seven hundred seventy-four billion, one million, six hundred sixty-four thousand, four hundred sixty-three".