20511217210712 has 16 divisors (see below), whose sum is σ = 38527578117360. Its totient is φ = 10237196379424.

The previous prime is 20511217210691. The next prime is 20511217210751. The reversal of 20511217210712 is 21701271211502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2301523508 + ... + 2301532419.

It is an arithmetic number, because the mean of its divisors is an integer number (2407973632335).

Almost surely, 2^{20511217210712} is an apocalyptic number.

It is an amenable number.

20511217210712 is a deficient number, since it is larger than the sum of its proper divisors (18016360906648).

20511217210712 is a wasteful number, since it uses less digits than its factorization.

20511217210712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4603056490 (or 4603056486 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 32.

The spelling of 20511217210712 in words is "twenty trillion, five hundred eleven billion, two hundred seventeen million, two hundred ten thousand, seven hundred twelve".