20201020099966 has 32 divisors (see below), whose sum is σ = 32300014600512. Its totient is φ = 9442364006400.

The previous prime is 20201020099937. The next prime is 20201020099991. The reversal of 20201020099966 is 66999002010202.

It is a congruent number.

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, 47312910 + ... + 47737966.

It is an arithmetic number, because the mean of its divisors is an integer number (1009375456266).

Almost surely, 2^{20201020099966} is an apocalyptic number.

20201020099966 is a deficient number, since it is larger than the sum of its proper divisors (12098994500546).

20201020099966 is a wasteful number, since it uses less digits than its factorization.

20201020099966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434484.

The product of its (nonzero) digits is 209952, while the sum is 46.

The spelling of 20201020099966 in words is "twenty trillion, two hundred one billion, twenty million, ninety-nine thousand, nine hundred sixty-six".