20707474636799 has 16 divisors (see below), whose sum is σ = 21012500789280. Its totient is φ = 20404331550720.

The previous prime is 20707474636777. The next prime is 20707474636801. The reversal of 20707474636799 is 99763647470702.

It is a cyclic number.

It is not a de Polignac number, because 20707474636799 - 2⁸ = 20707474636543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20707474636759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 334938512 + ... + 335000330.

It is an arithmetic number, because the mean of its divisors is an integer number (1313281299330).

Almost surely, 2^{20707474636799} is an apocalyptic number.

20707474636799 is a deficient number, since it is larger than the sum of its proper divisors (305026152481).

20707474636799 is a wasteful number, since it uses less digits than its factorization.

20707474636799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76970.

The product of its (nonzero) digits is 672126336, while the sum is 71.

The spelling of 20707474636799 in words is "twenty trillion, seven hundred seven billion, four hundred seventy-four million, six hundred thirty-six thousand, seven hundred ninety-nine".