21140323037 has 2 divisors, whose sum is σ = 21140323038. Its totient is φ = 21140323036.

The previous prime is 21140323031. The next prime is 21140323051. The reversal of 21140323037 is 73032304112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18208533721 + 2931789316 = 134939^2 + 54146^2 .

It is a cyclic number.

It is not a de Polignac number, because 21140323037 - 2¹⁴ = 21140306653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21140322997 and 21140323015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21140323031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570161518 + 10570161519.

It is an arithmetic number, because the mean of its divisors is an integer number (10570161519).

Almost surely, 2^21140323037 is an apocalyptic number.

It is an amenable number.

21140323037 is a deficient number, since it is larger than the sum of its proper divisors (1).

21140323037 is an equidigital number, since it uses as much as digits as its factorization.

21140323037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 26.

Adding to 21140323037 its reverse (73032304112), we get a palindrome (94172627149).

The spelling of 21140323037 in words is "twenty-one billion, one hundred forty million, three hundred twenty-three thousand, thirty-seven".