20017064218 has 8 divisors (see below), whose sum is σ = 30031267860. Its totient is φ = 10006641600.

The previous prime is 20017064213. The next prime is 20017064257. The reversal of 20017064218 is 81246071002.

It can be written as a sum of positive squares in 2 ways, for example, as 19422045769 + 595018449 = 139363^2 + 24393^2 .

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 20017064218.

It is not an unprimeable number, because it can be changed into a prime (20017064213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 931983 + ... + 953218.

Almost surely, 2^20017064218 is an apocalyptic number.

20017064218 is a deficient number, since it is larger than the sum of its proper divisors (10014203642).

20017064218 is a wasteful number, since it uses less digits than its factorization.

20017064218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890512.

The product of its (nonzero) digits is 5376, while the sum is 31.

The spelling of 20017064218 in words is "twenty billion, seventeen million, sixty-four thousand, two hundred eighteen".