33674073721 has 2 divisors, whose sum is σ = 33674073722. Its totient is φ = 33674073720.

The previous prime is 33674073709. The next prime is 33674073751. The reversal of 33674073721 is 12737047633.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32037062121 + 1637011600 = 178989^2 + 40460^2 .

It is an emirp because it is prime and its reverse (12737047633) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33674073721 is a prime.

It is a super-2 number, since 2×33674073721² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33674073751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16837036860 + 16837036861.

It is an arithmetic number, because the mean of its divisors is an integer number (16837036861).

Almost surely, 2^33674073721 is an apocalyptic number.

It is an amenable number.

33674073721 is a deficient number, since it is larger than the sum of its proper divisors (1).

33674073721 is an equidigital number, since it uses as much as digits as its factorization.

33674073721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 444528, while the sum is 43.

The spelling of 33674073721 in words is "thirty-three billion, six hundred seventy-four million, seventy-three thousand, seven hundred twenty-one".