21470732116237 has 2 divisors, whose sum is σ = 21470732116238. Its totient is φ = 21470732116236.

The previous prime is 21470732116231. The next prime is 21470732116271. The reversal of 21470732116237 is 73261123707412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19208532624516 + 2262199491721 = 4382754^2 + 1504061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21470732116237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21470732116231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10735366058118 + 10735366058119.

It is an arithmetic number, because the mean of its divisors is an integer number (10735366058119).

Almost surely, 2^{21470732116237} is an apocalyptic number.

It is an amenable number.

21470732116237 is a deficient number, since it is larger than the sum of its proper divisors (1).

21470732116237 is an equidigital number, since it uses as much as digits as its factorization.

21470732116237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 592704, while the sum is 46.

The spelling of 21470732116237 in words is "twenty-one trillion, four hundred seventy billion, seven hundred thirty-two million, one hundred sixteen thousand, two hundred thirty-seven".