20247679999 has 8 divisors (see below), whose sum is σ = 21136268160. Its totient is φ = 19359779736.

The previous prime is 20247679957. The next prime is 20247680023. The reversal of 20247679999 is 99997674202.

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 20247679999 - 2¹¹ = 20247677951 is a prime.

It is a Duffinian number.

It is a zygodrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 20247679999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20247679499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111357 + ... + 229990.

It is an arithmetic number, because the mean of its divisors is an integer number (2642033520).

Almost surely, 2^20247679999 is an apocalyptic number.

20247679999 is a deficient number, since it is larger than the sum of its proper divisors (888588161).

20247679999 is a wasteful number, since it uses less digits than its factorization.

20247679999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343949.

The product of its (nonzero) digits is 30862944, while the sum is 64.

The spelling of 20247679999 in words is "twenty billion, two hundred forty-seven million, six hundred seventy-nine thousand, nine hundred ninety-nine".