20659799998 has 8 divisors (see below), whose sum is σ = 30992993640. Its totient is φ = 10328802120.

The previous prime is 20659799987. The next prime is 20659800017. The reversal of 20659799998 is 89999795602.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20659799998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525213 + ... + 563176.

It is an arithmetic number, because the mean of its divisors is an integer number (3874124205).

Almost surely, 2^20659799998 is an apocalyptic number.

20659799998 is a deficient number, since it is larger than the sum of its proper divisors (10333193642).

20659799998 is a wasteful number, since it uses less digits than its factorization.

20659799998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097882.

The product of its (nonzero) digits is 198404640, while the sum is 73.

The spelling of 20659799998 in words is "twenty billion, six hundred fifty-nine million, seven hundred ninety-nine thousand, nine hundred ninety-eight".