20489662105724 has 48 divisors (see below), whose sum is σ = 41397077170176. Its totient is φ = 8691847257600.

The previous prime is 20489662105711. The next prime is 20489662105747. The reversal of 20489662105724 is 42750126698402.

It is a self number, because there is not a number n which added to its sum of digits gives 20489662105724.

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, 4294589 + ... + 7708619.

It is an arithmetic number, because the mean of its divisors is an integer number (862439107712).

Almost surely, 2^{20489662105724} is an apocalyptic number.

It is an amenable number.

20489662105724 is an abundant number, since it is smaller than the sum of its proper divisors (20907415064452).

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

20489662105724 is a wasteful number, since it uses less digits than its factorization.

20489662105724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3416226 (or 3416224 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 56.

The spelling of 20489662105724 in words is "twenty trillion, four hundred eighty-nine billion, six hundred sixty-two million, one hundred five thousand, seven hundred twenty-four".