20017711667 has 8 divisors (see below), whose sum is σ = 21450589776. Its totient is φ = 18613207552.

The previous prime is 20017711663. The next prime is 20017711699. The reversal of 20017711667 is 76611771002.

It is a happy number.

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 20017711667 - 2² = 20017711663 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20017711667.

It is not an unprimeable number, because it can be changed into a prime (20017711663) 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, 7092038 + ... + 7094859.

It is an arithmetic number, because the mean of its divisors is an integer number (2681323722).

Almost surely, 2^20017711667 is an apocalyptic number.

20017711667 is a deficient number, since it is larger than the sum of its proper divisors (1432878109).

20017711667 is a wasteful number, since it uses less digits than its factorization.

20017711667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14186997.

The product of its (nonzero) digits is 24696, while the sum is 38.

The spelling of 20017711667 in words is "twenty billion, seventeen million, seven hundred eleven thousand, six hundred sixty-seven".