20871951200944 has 40 divisors (see below), whose sum is σ = 40952394037760. Its totient is φ = 10303598530368.

The previous prime is 20871951200921. The next prime is 20871951200993. The reversal of 20871951200944 is 44900215917802.

It is a super-2 number, since 2×20871951200944² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20871951200891 and 20871951200900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51804079 + ... + 52205425.

It is an arithmetic number, because the mean of its divisors is an integer number (1023809850944).

Almost surely, 2^{20871951200944} is an apocalyptic number.

It is an amenable number.

20871951200944 is a deficient number, since it is larger than the sum of its proper divisors (20080442836816).

20871951200944 is a wasteful number, since it uses less digits than its factorization.

20871951200944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442577 (or 442571 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 20871951200944 in words is "twenty trillion, eight hundred seventy-one billion, nine hundred fifty-one million, two hundred thousand, nine hundred forty-four".