20123220322 has 4 divisors (see below), whose sum is σ = 30184830486. Its totient is φ = 10061610160.

The previous prime is 20123220319. The next prime is 20123220323. The reversal of 20123220322 is 22302232102.

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

It can be written as a sum of positive squares in only one way, i.e., 20116032561 + 7187761 = 141831^2 + 2681^2 .

It is a super-2 number, since 2×20123220322² (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 20123220322.

It is not an unprimeable number, because it can be changed into a prime (20123220323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5030805079 + ... + 5030805082.

Almost surely, 2^20123220322 is an apocalyptic number.

20123220322 is a deficient number, since it is larger than the sum of its proper divisors (10061610164).

20123220322 is a wasteful number, since it uses less digits than its factorization.

20123220322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10061610163.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20123220322 its reverse (22302232102), we get a palindrome (42425452424).

The spelling of 20123220322 in words is "twenty billion, one hundred twenty-three million, two hundred twenty thousand, three hundred twenty-two".