20223156377 has 2 divisors, whose sum is σ = 20223156378. Its totient is φ = 20223156376.

The previous prime is 20223156367. The next prime is 20223156379. The reversal of 20223156377 is 77365132202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20106105616 + 117050761 = 141796^2 + 10819^2 .

It is a cyclic number.

It is not a de Polignac number, because 20223156377 - 2⁶ = 20223156313 is a prime.

It is a super-2 number, since 2×20223156377² (a number of 21 digits) contains 22 as substring.

Together with 20223156379, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20223156377.

It is not a weakly prime, because it can be changed into another prime (20223156379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111578188 + 10111578189.

It is an arithmetic number, because the mean of its divisors is an integer number (10111578189).

Almost surely, 2^20223156377 is an apocalyptic number.

It is an amenable number.

20223156377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20223156377 is an equidigital number, since it uses as much as digits as its factorization.

20223156377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 38.

Adding to 20223156377 its reverse (77365132202), we get a palindrome (97588288579).

The spelling of 20223156377 in words is "twenty billion, two hundred twenty-three million, one hundred fifty-six thousand, three hundred seventy-seven".