22820608729 has 2 divisors, whose sum is σ = 22820608730. Its totient is φ = 22820608728.

The previous prime is 22820608667. The next prime is 22820608781. The reversal of 22820608729 is 92780602822.

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., 14731405129 + 8089203600 = 121373^2 + 89940^2 .

It is a cyclic number.

It is not a de Polignac number, because 22820608729 - 2¹⁷ = 22820477657 is a prime.

It is a super-2 number, since 2×22820608729² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22820608799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11410304364 + 11410304365.

It is an arithmetic number, because the mean of its divisors is an integer number (11410304365).

Almost surely, 2^22820608729 is an apocalyptic number.

It is an amenable number.

22820608729 is a deficient number, since it is larger than the sum of its proper divisors (1).

22820608729 is an equidigital number, since it uses as much as digits as its factorization.

22820608729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 22820608729 in words is "twenty-two billion, eight hundred twenty million, six hundred eight thousand, seven hundred twenty-nine".