20351643245516 has 12 divisors (see below), whose sum is σ = 38853137105160. Its totient is φ = 9250746929760.

The previous prime is 20351643245497. The next prime is 20351643245543. The reversal of 20351643245516 is 61554234615302.

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, 231268673201 + ... + 231268673288.

It is an arithmetic number, because the mean of its divisors is an integer number (3237761425430).

Almost surely, 2^{20351643245516} is an apocalyptic number.

It is an amenable number.

20351643245516 is a deficient number, since it is larger than the sum of its proper divisors (18501493859644).

20351643245516 is a wasteful number, since it uses less digits than its factorization.

20351643245516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462537346504 (or 462537346502 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 47.

The spelling of 20351643245516 in words is "twenty trillion, three hundred fifty-one billion, six hundred forty-three million, two hundred forty-five thousand, five hundred sixteen".