21265035037 has 2 divisors, whose sum is σ = 21265035038. Its totient is φ = 21265035036.

The previous prime is 21265035023. The next prime is 21265035047. The reversal of 21265035037 is 73053056212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14091114436 + 7173920601 = 118706^2 + 84699^2 .

It is a cyclic number.

It is not a de Polignac number, because 21265035037 - 2⁷ = 21265034909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21265034993 and 21265035011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21265035047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10632517518 + 10632517519.

It is an arithmetic number, because the mean of its divisors is an integer number (10632517519).

Almost surely, 2^21265035037 is an apocalyptic number.

It is an amenable number.

21265035037 is a deficient number, since it is larger than the sum of its proper divisors (1).

21265035037 is an equidigital number, since it uses as much as digits as its factorization.

21265035037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 34.

The spelling of 21265035037 in words is "twenty-one billion, two hundred sixty-five million, thirty-five thousand, thirty-seven".