20516417769 has 8 divisors (see below), whose sum is σ = 27937249920. Its totient is φ = 13386598736.

The previous prime is 20516417741. The next prime is 20516417783. The reversal of 20516417769 is 96771461502.

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 20516417769 - 2²⁹ = 19979546857 is a prime.

It is a super-2 number, since 2×20516417769² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20516417729) 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, 72753114 + ... + 72753395.

It is an arithmetic number, because the mean of its divisors is an integer number (3492156240).

Almost surely, 2^20516417769 is an apocalyptic number.

It is an amenable number.

20516417769 is a deficient number, since it is larger than the sum of its proper divisors (7420832151).

20516417769 is a wasteful number, since it uses less digits than its factorization.

20516417769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145506559.

The product of its (nonzero) digits is 635040, while the sum is 48.

The spelling of 20516417769 in words is "twenty billion, five hundred sixteen million, four hundred seventeen thousand, seven hundred sixty-nine".