21274617241837 has 2 divisors, whose sum is σ = 21274617241838. Its totient is φ = 21274617241836.

The previous prime is 21274617241783. The next prime is 21274617241847. The reversal of 21274617241837 is 73814271647212.

Together with previous prime (21274617241783) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16199063337636 + 5075553904201 = 4024806^2 + 2252899^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21274617241837 is a prime.

It is a super-2 number, since 2×21274617241837² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21274617241847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10637308620918 + 10637308620919.

It is an arithmetic number, because the mean of its divisors is an integer number (10637308620919).

Almost surely, 2^{21274617241837} is an apocalyptic number.

It is an amenable number.

21274617241837 is a deficient number, since it is larger than the sum of its proper divisors (1).

21274617241837 is an equidigital number, since it uses as much as digits as its factorization.

21274617241837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6322176, while the sum is 55.

The spelling of 21274617241837 in words is "twenty-one trillion, two hundred seventy-four billion, six hundred seventeen million, two hundred forty-one thousand, eight hundred thirty-seven".