20022031 has 4 divisors (see below), whose sum is σ = 20063632. Its totient is φ = 19980432.

The previous prime is 20022017. The next prime is 20022043. The reversal of 20022031 is 13022002.

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 20022031 - 2⁵ = 20021999 is a prime.

It is a super-2 number, since 2×20022031² = 801763450729922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20021999 and 20022017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20070 + ... + 21043.

It is an arithmetic number, because the mean of its divisors is an integer number (5015908).

Almost surely, 2^20022031 is an apocalyptic number.

20022031 is a deficient number, since it is larger than the sum of its proper divisors (41601).

20022031 is an equidigital number, since it uses as much as digits as its factorization.

20022031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41600.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 20022031 is about 4474.5984177354. The cubic root of 20022031 is about 271.5413939760.

Adding to 20022031 its reverse (13022002), we get a palindrome (33044033).

The spelling of 20022031 in words is "twenty million, twenty-two thousand, thirty-one".