20001715890210 has 64 divisors (see below), whose sum is σ = 53343677606400. Its totient is φ = 5333214047616.

The previous prime is 20001715890203. The next prime is 20001715890217. The reversal of 20001715890210 is 1209851710002.

It is a happy number.

20001715890210 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 1 + 71 + 589 + 0 + 2 + 1 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (20001715890203) and next prime (20001715890217).

It is not an unprimeable number, because it can be changed into a prime (20001715890217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1501930 + ... + 6500709.

It is an arithmetic number, because the mean of its divisors is an integer number (833494962600).

Almost surely, 2^{20001715890210} is an apocalyptic number.

20001715890210 is an abundant number, since it is smaller than the sum of its proper divisors (33341961716190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20001715890210 is a wasteful number, since it uses less digits than its factorization.

20001715890210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8011912 (or 8011906 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The spelling of 20001715890210 in words is "twenty trillion, one billion, seven hundred fifteen million, eight hundred ninety thousand, two hundred ten".