20038888833517 has 16 divisors (see below), whose sum is σ = 20801829587760. Its totient is φ = 19280802014208.

The previous prime is 20038888833437. The next prime is 20038888833529. The reversal of 20038888833517 is 71533888883002.

It can be written as a sum of positive squares in 8 ways, for example, as 10516393924201 + 9522494909316 = 3242899^2 + 3085854^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20038888833517 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 (20038888833547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19003303 + ... + 20030059.

It is an arithmetic number, because the mean of its divisors is an integer number (1300114349235).

Almost surely, 2^{20038888833517} is an apocalyptic number.

It is an amenable number.

20038888833517 is a deficient number, since it is larger than the sum of its proper divisors (762940754243).

20038888833517 is a wasteful number, since it uses less digits than its factorization.

20038888833517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029120.

The product of its (nonzero) digits is 61931520, while the sum is 64.

The spelling of 20038888833517 in words is "twenty trillion, thirty-eight billion, eight hundred eighty-eight million, eight hundred thirty-three thousand, five hundred seventeen".