7820022240013 has 4 divisors (see below), whose sum is σ = 7831573233660. Its totient is φ = 7808471246368.

The previous prime is 7820022240007. The next prime is 7820022240053. The reversal of 7820022240013 is 3100422200287.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7121196462249 + 698825777764 = 2668557^2 + 835958^2 .

It is a cyclic number.

It is not a de Polignac number, because 7820022240013 - 2³⁷ = 7682583286541 is a prime.

It is a super-2 number, since 2×7820022240013² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7820022240053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5775495808 + ... + 5775497161.

It is an arithmetic number, because the mean of its divisors is an integer number (1957893308415).

Almost surely, 2^{7820022240013} is an apocalyptic number.

It is an amenable number.

7820022240013 is a deficient number, since it is larger than the sum of its proper divisors (11550993647).

7820022240013 is a wasteful number, since it uses less digits than its factorization.

7820022240013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11550993646.

The product of its (nonzero) digits is 10752, while the sum is 31.

The spelling of 7820022240013 in words is "seven trillion, eight hundred twenty billion, twenty-two million, two hundred forty thousand, thirteen".