20043320031 has 24 divisors (see below), whose sum is σ = 34525969920. Its totient is φ = 10955354256.

The previous prime is 20043320029. The next prime is 20043320071. The reversal of 20043320031 is 13002334002.

20043320031 is a `hidden beast` number, since 2 + 0 + 0 + 433 + 200 + 31 = 666.

It is not a de Polignac number, because 20043320031 - 2¹ = 20043320029 is a prime.

It is a super-2 number, since 2×20043320031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20043319986 and 20043320013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043320071) 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, 6914811 + ... + 6917708.

It is an arithmetic number, because the mean of its divisors is an integer number (1438582080).

Almost surely, 2^20043320031 is an apocalyptic number.

20043320031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20043320031 is a deficient number, since it is larger than the sum of its proper divisors (14482649889).

20043320031 is a wasteful number, since it uses less digits than its factorization.

20043320031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13832555 (or 13832552 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 20043320031 its reverse (13002334002), we get a palindrome (33045654033).

The spelling of 20043320031 in words is "twenty billion, forty-three million, three hundred twenty thousand, thirty-one".