20001223031 has 8 divisors (see below), whose sum is σ = 21247076400. Its totient is φ = 18774685440.

The previous prime is 20001223019. The next prime is 20001223087. The reversal of 20001223031 is 13032210002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001223031 is a prime.

It is a super-2 number, since 2×20001223031² (a number of 21 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 = 20001222997 and 20001223015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001223091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4826810 + ... + 4830951.

It is an arithmetic number, because the mean of its divisors is an integer number (2655884550).

Almost surely, 2^20001223031 is an apocalyptic number.

20001223031 is a deficient number, since it is larger than the sum of its proper divisors (1245853369).

20001223031 is a wasteful number, since it uses less digits than its factorization.

20001223031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9657889.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20001223031 its reverse (13032210002), we get a palindrome (33033433033).

The spelling of 20001223031 in words is "twenty billion, one million, two hundred twenty-three thousand, thirty-one".