20996144434764 has 72 divisors (see below), whose sum is σ = 56293980030288. Its totient is φ = 6575489648640.

The previous prime is 20996144434697. The next prime is 20996144434787. The reversal of 20996144434764 is 46743444169902.

20996144434764 is a `hidden beast` number, since 2 + 0 + 9 + 9 + 614 + 4 + 4 + 3 + 4 + 7 + 6 + 4 = 666.

It is a super-2 number, since 2×20996144434764² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29692077 + ... + 30390980.

It is an arithmetic number, because the mean of its divisors is an integer number (781860833754).

Almost surely, 2^{20996144434764} is an apocalyptic number.

It is an amenable number.

20996144434764 is an abundant number, since it is smaller than the sum of its proper divisors (35297835595524).

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

20996144434764 is a wasteful number, since it uses less digits than its factorization.

20996144434764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60083655 (or 60083650 counting only the distinct ones).

The product of its (nonzero) digits is 125411328, while the sum is 63.

The spelling of 20996144434764 in words is "twenty trillion, nine hundred ninety-six billion, one hundred forty-four million, four hundred thirty-four thousand, seven hundred sixty-four".