20223031181 has 2 divisors, whose sum is σ = 20223031182. Its totient is φ = 20223031180.

The previous prime is 20223031177. The next prime is 20223031243. The reversal of 20223031181 is 18113032202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20196673225 + 26357956 = 142115^2 + 5134^2 .

It is a cyclic number.

It is not a de Polignac number, because 20223031181 - 2² = 20223031177 is a prime.

It is a super-2 number, since 2×20223031181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20223031111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111515590 + 10111515591.

It is an arithmetic number, because the mean of its divisors is an integer number (10111515591).

Almost surely, 2^20223031181 is an apocalyptic number.

It is an amenable number.

20223031181 is a deficient number, since it is larger than the sum of its proper divisors (1).

20223031181 is an equidigital number, since it uses as much as digits as its factorization.

20223031181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 20223031181 its reverse (18113032202), we get a palindrome (38336063383).

The spelling of 20223031181 in words is "twenty billion, two hundred twenty-three million, thirty-one thousand, one hundred eighty-one".