20747799020869 has 8 divisors (see below), whose sum is σ = 21839834634080. Its totient is φ = 19655768026800.

The previous prime is 20747799020849. The next prime is 20747799020903. The reversal of 20747799020869 is 96802099774702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20747799020869 - 2⁹ = 20747799020357 is a prime.

It is a super-2 number, since 2×20747799020869² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20747799020798 and 20747799020807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20747799020849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11780179 + ... + 13426399.

It is an arithmetic number, because the mean of its divisors is an integer number (2729979329260).

Almost surely, 2^{20747799020869} is an apocalyptic number.

It is an amenable number.

20747799020869 is a deficient number, since it is larger than the sum of its proper divisors (1092035613211).

20747799020869 is a wasteful number, since it uses less digits than its factorization.

20747799020869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2309571.

The product of its (nonzero) digits is 192036096, while the sum is 70.

The spelling of 20747799020869 in words is "twenty trillion, seven hundred forty-seven billion, seven hundred ninety-nine million, twenty thousand, eight hundred sixty-nine".