20968144467328 has 64 divisors (see below), whose sum is σ = 46557557708400. Its totient is φ = 9348027236352.

The previous prime is 20968144467317. The next prime is 20968144467337. The reversal of 20968144467328 is 82376444186902.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a self number, because there is not a number n which added to its sum of digits gives 20968144467328.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253540125 + ... + 253622812.

Almost surely, 2^{20968144467328} is an apocalyptic number.

It is an amenable number.

20968144467328 is an abundant number, since it is smaller than the sum of its proper divisors (25589413241072).

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

20968144467328 is a wasteful number, since it uses less digits than its factorization.

20968144467328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507162987 (or 507162975 counting only the distinct ones).

The product of its (nonzero) digits is 111476736, while the sum is 64.

The spelling of 20968144467328 in words is "twenty trillion, nine hundred sixty-eight billion, one hundred forty-four million, four hundred sixty-seven thousand, three hundred twenty-eight".