33340020301981 has 2 divisors, whose sum is σ = 33340020301982. Its totient is φ = 33340020301980.

The previous prime is 33340020301979. The next prime is 33340020302023. The reversal of 33340020301981 is 18910302004333.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20492742125881 + 12847278176100 = 4526891^2 + 3584310^2 .

It is an emirp because it is prime and its reverse (18910302004333) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33340020301981 - 2¹ = 33340020301979 is a prime.

It is a super-2 number, since 2×33340020301981² (a number of 28 digits) contains 22 as substring.

Together with 33340020301979, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 33340020301981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33340020371981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16670010150990 + 16670010150991.

It is an arithmetic number, because the mean of its divisors is an integer number (16670010150991).

Almost surely, 2^{33340020301981} is an apocalyptic number.

It is an amenable number.

33340020301981 is a deficient number, since it is larger than the sum of its proper divisors (1).

33340020301981 is an equidigital number, since it uses as much as digits as its factorization.

33340020301981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 37.

The spelling of 33340020301981 in words is "thirty-three trillion, three hundred forty billion, twenty million, three hundred one thousand, nine hundred eighty-one".