20211023031 has 4 divisors (see below), whose sum is σ = 26948030712. Its totient is φ = 13474015352.

The previous prime is 20211023023. The next prime is 20211023047. The reversal of 20211023031 is 13032011202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20211023031 - 2³ = 20211023023 is a prime.

It is a super-2 number, since 2×20211023031² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20211023031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211023011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3368503836 + ... + 3368503841.

It is an arithmetic number, because the mean of its divisors is an integer number (6737007678).

Almost surely, 2^20211023031 is an apocalyptic number.

20211023031 is a deficient number, since it is larger than the sum of its proper divisors (6737007681).

20211023031 is an equidigital number, since it uses as much as digits as its factorization.

20211023031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6737007680.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20211023031 its reverse (13032011202), we get a palindrome (33243034233).

The spelling of 20211023031 in words is "twenty billion, two hundred eleven million, twenty-three thousand, thirty-one".