20422040321 has 4 divisors (see below), whose sum is σ = 20701794372. Its totient is φ = 20142286272.

The previous prime is 20422040311. The next prime is 20422040329. The reversal of 20422040321 is 12304022402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13203159025 + 7218881296 = 114905^2 + 84964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20422040321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20422040293 and 20422040302.

It is not an unprimeable number, because it can be changed into a prime (20422040329) 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, 139876916 + ... + 139877061.

It is an arithmetic number, because the mean of its divisors is an integer number (5175448593).

Almost surely, 2^20422040321 is an apocalyptic number.

It is an amenable number.

20422040321 is a deficient number, since it is larger than the sum of its proper divisors (279754051).

20422040321 is an equidigital number, since it uses as much as digits as its factorization.

20422040321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279754050.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20422040321 its reverse (12304022402), we get a palindrome (32726062723).

The spelling of 20422040321 in words is "twenty billion, four hundred twenty-two million, forty thousand, three hundred twenty-one".