20043281649972 has 96 divisors (see below), whose sum is σ = 54405389832192. Its totient is φ = 5624952541056.

The previous prime is 20043281649947. The next prime is 20043281649973. The reversal of 20043281649972 is 27994618234002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043281649973) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7102588 + ... + 9514899.

It is an arithmetic number, because the mean of its divisors is an integer number (566722810752).

Almost surely, 2^{20043281649972} is an apocalyptic number.

It is an amenable number.

20043281649972 is an abundant number, since it is smaller than the sum of its proper divisors (34362108182220).

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

20043281649972 is a wasteful number, since it uses less digits than its factorization.

20043281649972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16617757 (or 16617755 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 57.

The spelling of 20043281649972 in words is "twenty trillion, forty-three billion, two hundred eighty-one million, six hundred forty-nine thousand, nine hundred seventy-two".