21042024037 has 2 divisors, whose sum is σ = 21042024038. Its totient is φ = 21042024036.

The previous prime is 21042024011. The next prime is 21042024049. The reversal of 21042024037 is 73042024012.

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., 16208854596 + 4833169441 = 127314^2 + 69521^2 .

It is a cyclic number.

It is not a de Polignac number, because 21042024037 - 2⁷ = 21042023909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21042024077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10521012018 + 10521012019.

It is an arithmetic number, because the mean of its divisors is an integer number (10521012019).

Almost surely, 2^21042024037 is an apocalyptic number.

It is an amenable number.

21042024037 is a deficient number, since it is larger than the sum of its proper divisors (1).

21042024037 is an equidigital number, since it uses as much as digits as its factorization.

21042024037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 25.

Subtracting from 21042024037 its sum of digits (25), we obtain a palindrome (21042024012).

Adding to 21042024037 its reverse (73042024012), we get a palindrome (94084048049).

The spelling of 21042024037 in words is "twenty-one billion, forty-two million, twenty-four thousand, thirty-seven".