20422031 has 4 divisors (see below), whose sum is σ = 23339472. Its totient is φ = 17504592.

The previous prime is 20422027. The next prime is 20422037. The reversal of 20422031 is 13022402.

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

It is not a de Polignac number, because 20422031 - 2² = 20422027 is a prime.

It is a super-2 number, since 2×20422031² = 834118700329922, 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 = 20421997 and 20422015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422037) 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, 1458710 + ... + 1458723.

It is an arithmetic number, because the mean of its divisors is an integer number (5834868).

Almost surely, 2^20422031 is an apocalyptic number.

20422031 is a deficient number, since it is larger than the sum of its proper divisors (2917441).

20422031 is an equidigital number, since it uses as much as digits as its factorization.

20422031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917440.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20422031 is about 4519.0741308370. The cubic root of 20422031 is about 273.3377679563.

Adding to 20422031 its reverse (13022402), we get a palindrome (33444433).

The spelling of 20422031 in words is "twenty million, four hundred twenty-two thousand, thirty-one".