20422215331 has 4 divisors (see below), whose sum is σ = 23339674672. Its totient is φ = 17504755992.

The previous prime is 20422215323. The next prime is 20422215347. The reversal of 20422215331 is 13351222402.

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 20422215331 - 2³ = 20422215323 is a prime.

It is a super-2 number, since 2×20422215331² (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 = 20422215296 and 20422215305.

It is not an unprimeable number, because it can be changed into a prime (20422212331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1458729660 + ... + 1458729673.

It is an arithmetic number, because the mean of its divisors is an integer number (5834918668).

Almost surely, 2^20422215331 is an apocalyptic number.

20422215331 is a deficient number, since it is larger than the sum of its proper divisors (2917459341).

20422215331 is an equidigital number, since it uses as much as digits as its factorization.

20422215331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2917459340.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 20422215331 its reverse (13351222402), we get a palindrome (33773437733).

The spelling of 20422215331 in words is "twenty billion, four hundred twenty-two million, two hundred fifteen thousand, three hundred thirty-one".