21167340037 has 2 divisors, whose sum is σ = 21167340038. Its totient is φ = 21167340036.

The previous prime is 21167340023. The next prime is 21167340053. The reversal of 21167340037 is 73004376112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20918993956 + 248346081 = 144634^2 + 15759^2 .

It is a cyclic number.

It is not a de Polignac number, because 21167340037 - 2¹⁹ = 21166815749 is a prime.

It is a super-2 number, since 2×21167340037² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21167339984 and 21167340011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21164340037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10583670018 + 10583670019.

It is an arithmetic number, because the mean of its divisors is an integer number (10583670019).

Almost surely, 2^21167340037 is an apocalyptic number.

It is an amenable number.

21167340037 is a deficient number, since it is larger than the sum of its proper divisors (1).

21167340037 is an equidigital number, since it uses as much as digits as its factorization.

21167340037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 34.

The spelling of 21167340037 in words is "twenty-one billion, one hundred sixty-seven million, three hundred forty thousand, thirty-seven".