20811421863044 has 48 divisors (see below), whose sum is σ = 38841985340928. Its totient is φ = 9734003186688.

The previous prime is 20811421863007. The next prime is 20811421863047. The reversal of 20811421863044 is 44036812411802.

It is a junction number, because it is equal to n+sod(n) for n = 20811421862986 and 20811421863004.

It is not an unprimeable number, because it can be changed into a prime (20811421863047) 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, 3752792 + ... + 7463664.

It is an arithmetic number, because the mean of its divisors is an integer number (809208027936).

Almost surely, 2^{20811421863044} is an apocalyptic number.

It is an amenable number.

20811421863044 is a deficient number, since it is larger than the sum of its proper divisors (18030563477884).

20811421863044 is a wasteful number, since it uses less digits than its factorization.

20811421863044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3712244 (or 3712242 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 44.

The spelling of 20811421863044 in words is "twenty trillion, eight hundred eleven billion, four hundred twenty-one million, eight hundred sixty-three thousand, forty-four".