20021021112036 has 48 divisors (see below), whose sum is σ = 53390983919616. Its totient is φ = 5720120929824.

The previous prime is 20021021112023. The next prime is 20021021112083. The reversal of 20021021112036 is 63021112012002.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 15 ways as a sum of consecutive naturals, for example, 715506 + ... + 6368201.

It is an arithmetic number, because the mean of its divisors is an integer number (1112312164992).

Almost surely, 2^{20021021112036} is an apocalyptic number.

It is an amenable number.

20021021112036 is an abundant number, since it is smaller than the sum of its proper divisors (33369962807580).

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

20021021112036 is a wasteful number, since it uses less digits than its factorization.

20021021112036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7117368 (or 7117366 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 20021021112036 its reverse (63021112012002), we get a palindrome (83042133124038).

The spelling of 20021021112036 in words is "twenty trillion, twenty-one billion, twenty-one million, one hundred twelve thousand, thirty-six".