22740061 has 2 divisors, whose sum is σ = 22740062. Its totient is φ = 22740060.

The previous prime is 22740043. The next prime is 22740073. The reversal of 22740061 is 16004722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20196036 + 2544025 = 4494^2 + 1595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22740061 is a prime.

It is a super-2 number, since 2×22740061² = 1034220748567442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22740161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11370030 + 11370031.

It is an arithmetic number, because the mean of its divisors is an integer number (11370031).

Almost surely, 2^22740061 is an apocalyptic number.

It is an amenable number.

22740061 is a deficient number, since it is larger than the sum of its proper divisors (1).

22740061 is an equidigital number, since it uses as much as digits as its factorization.

22740061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 22740061 is about 4768.6540029656. The cubic root of 22740061 is about 283.3112857892.

Adding to 22740061 its reverse (16004722), we get a palindrome (38744783).

The spelling of 22740061 in words is "twenty-two million, seven hundred forty thousand, sixty-one".