21331300037 has 2 divisors, whose sum is σ = 21331300038. Its totient is φ = 21331300036.

The previous prime is 21331300013. The next prime is 21331300063. The reversal of 21331300037 is 73000313312.

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., 21174324196 + 156975841 = 145514^2 + 12529^2 .

It is a cyclic number.

It is not a de Polignac number, because 21331300037 - 2²⁰ = 21330251461 is a prime.

It is a super-2 number, since 2×21331300037² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21331299985 and 21331300021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21331300537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665650018 + 10665650019.

It is an arithmetic number, because the mean of its divisors is an integer number (10665650019).

Almost surely, 2^21331300037 is an apocalyptic number.

It is an amenable number.

21331300037 is a deficient number, since it is larger than the sum of its proper divisors (1).

21331300037 is an equidigital number, since it uses as much as digits as its factorization.

21331300037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 23.

Adding to 21331300037 its reverse (73000313312), we get a palindrome (94331613349).

The spelling of 21331300037 in words is "twenty-one billion, three hundred thirty-one million, three hundred thousand, thirty-seven".