20539738069 has 8 divisors (see below), whose sum is σ = 20878813760. Its totient is φ = 20203261056.

The previous prime is 20539738039. The next prime is 20539738073. The reversal of 20539738069 is 96083793502.

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 20539738069 - 2²⁷ = 20405520341 is a prime.

It is a super-4 number, since 4×20539738069⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20539738019) 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, 633729 + ... + 665350.

It is an arithmetic number, because the mean of its divisors is an integer number (2609851720).

Almost surely, 2^20539738069 is an apocalyptic number.

It is an amenable number.

20539738069 is a deficient number, since it is larger than the sum of its proper divisors (339075691).

20539738069 is a wasteful number, since it uses less digits than its factorization.

20539738069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299339.

The product of its (nonzero) digits is 2449440, while the sum is 52.

The spelling of 20539738069 in words is "twenty billion, five hundred thirty-nine million, seven hundred thirty-eight thousand, sixty-nine".