34002018721 has 4 divisors (see below), whose sum is σ = 37093111344. Its totient is φ = 30910926100.

The previous prime is 34002018709. The next prime is 34002018749. The reversal of 34002018721 is 12781020043.

It is the 75280-th star number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12781020043 = 11 ⋅1161910913.

It is a cyclic number.

It is not a de Polignac number, because 34002018721 - 2⁹ = 34002018209 is a prime.

It is a super-2 number, since 2×34002018721² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 34002018721.

It is not an unprimeable number, because it can be changed into a prime (34002018521) 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 in 3 ways as a sum of consecutive naturals, for example, 1545546295 + ... + 1545546316.

It is an arithmetic number, because the mean of its divisors is an integer number (9273277836).

Almost surely, 2^34002018721 is an apocalyptic number.

It is an amenable number.

34002018721 is a deficient number, since it is larger than the sum of its proper divisors (3091092623).

34002018721 is a wasteful number, since it uses less digits than its factorization.

34002018721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3091092622.

The product of its (nonzero) digits is 2688, while the sum is 28.

Adding to 34002018721 its reverse (12781020043), we get a palindrome (46783038764).

The spelling of 34002018721 in words is "thirty-four billion, two million, eighteen thousand, seven hundred twenty-one".