21023007037 has 2 divisors, whose sum is σ = 21023007038. Its totient is φ = 21023007036.

The previous prime is 21023007017. The next prime is 21023007067. The reversal of 21023007037 is 73070032012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20868402681 + 154604356 = 144459^2 + 12434^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21023007037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21023007017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511503518 + 10511503519.

It is an arithmetic number, because the mean of its divisors is an integer number (10511503519).

Almost surely, 2^21023007037 is an apocalyptic number.

It is an amenable number.

21023007037 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023007037 is an equidigital number, since it uses as much as digits as its factorization.

21023007037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 25.

Adding to 21023007037 its reverse (73070032012), we get a palindrome (94093039049).

The spelling of 21023007037 in words is "twenty-one billion, twenty-three million, seven thousand, thirty-seven".