20721933922752 has 112 divisors (see below), whose sum is σ = 62335361313280. Its totient is φ = 6746676136704.

The previous prime is 20721933922601. The next prime is 20721933922759. The reversal of 20721933922752 is 25722933912702.

20721933922752 is a `hidden beast` number, since 2 + 0 + 7 + 219 + 339 + 22 + 75 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20721933922759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139365928 + ... + 139514535.

Almost surely, 2^{20721933922752} is an apocalyptic number.

It is an amenable number.

20721933922752 is an abundant number, since it is smaller than the sum of its proper divisors (41613427390528).

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

20721933922752 is a wasteful number, since it uses less digits than its factorization.

20721933922752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278880527 (or 278880511 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 54.

The spelling of 20721933922752 in words is "twenty trillion, seven hundred twenty-one billion, nine hundred thirty-three million, nine hundred twenty-two thousand, seven hundred fifty-two".