20139717298 has 8 divisors (see below), whose sum is σ = 30779568108. Its totient is φ = 9879861264.

The previous prime is 20139717293. The next prime is 20139717307. The reversal of 20139717298 is 89271793102.

It can be written as a sum of positive squares in 2 ways, for example, as 15589270449 + 4550446849 = 124857^2 + 67457^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20139717293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94998561 + ... + 94998772.

Almost surely, 2^20139717298 is an apocalyptic number.

20139717298 is a deficient number, since it is larger than the sum of its proper divisors (10639850810).

20139717298 is a wasteful number, since it uses less digits than its factorization.

20139717298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189997388.

The product of its (nonzero) digits is 381024, while the sum is 49.

The spelling of 20139717298 in words is "twenty billion, one hundred thirty-nine million, seven hundred seventeen thousand, two hundred ninety-eight".