20001666202 has 32 divisors (see below), whose sum is σ = 35358216192. Its totient is φ = 8308274544.

The previous prime is 20001666193. The next prime is 20001666221. The reversal of 20001666202 is 20266610002.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79788 + ... + 215335.

It is an arithmetic number, because the mean of its divisors is an integer number (1104944256).

Almost surely, 2^20001666202 is an apocalyptic number.

20001666202 is a deficient number, since it is larger than the sum of its proper divisors (15356549990).

20001666202 is a wasteful number, since it uses less digits than its factorization.

20001666202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295282.

The product of its (nonzero) digits is 1728, while the sum is 25.

The spelling of 20001666202 in words is "twenty billion, one million, six hundred sixty-six thousand, two hundred two".