20040221443331 has 24 divisors (see below), whose sum is σ = 21000585547200. Its totient is φ = 19122132805776.

The previous prime is 20040221443327. The next prime is 20040221443427. The reversal of 20040221443331 is 13334412204002.

It is not a de Polignac number, because 20040221443331 - 2² = 20040221443327 is a prime.

It is a super-2 number, since 2×20040221443331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20040221443294 and 20040221443303.

It is not an unprimeable number, because it can be changed into a prime (20040221440331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 491607356 + ... + 491648118.

It is an arithmetic number, because the mean of its divisors is an integer number (875024397800).

Almost surely, 2^{20040221443331} is an apocalyptic number.

20040221443331 is a deficient number, since it is larger than the sum of its proper divisors (960364103869).

20040221443331 is a wasteful number, since it uses less digits than its factorization.

20040221443331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43055 (or 43032 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 20040221443331 its reverse (13334412204002), we get a palindrome (33374633647333).

The spelling of 20040221443331 in words is "twenty trillion, forty billion, two hundred twenty-one million, four hundred forty-three thousand, three hundred thirty-one".