33861820673 has 2 divisors, whose sum is σ = 33861820674. Its totient is φ = 33861820672.

The previous prime is 33861820607. The next prime is 33861820687. The reversal of 33861820673 is 37602816833.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29454454129 + 4407366544 = 171623^2 + 66388^2 .

It is an emirp because it is prime and its reverse (37602816833) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33861820673 - 2¹² = 33861816577 is a prime.

It is a super-2 number, since 2×33861820673² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33861826673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16930910336 + 16930910337.

It is an arithmetic number, because the mean of its divisors is an integer number (16930910337).

Almost surely, 2^33861820673 is an apocalyptic number.

It is an amenable number.

33861820673 is a deficient number, since it is larger than the sum of its proper divisors (1).

33861820673 is an equidigital number, since it uses as much as digits as its factorization.

33861820673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 33861820673 in words is "thirty-three billion, eight hundred sixty-one million, eight hundred twenty thousand, six hundred seventy-three".