5820821909 has 8 divisors (see below), whose sum is σ = 6658778880. Its totient is φ = 4984467696.

The previous prime is 5820821869. The next prime is 5820821911. The reversal of 5820821909 is 9091280285.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5820821909 is a prime.

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 5820821909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5820821939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392894 + ... + 407439.

It is an arithmetic number, because the mean of its divisors is an integer number (832347360).

Almost surely, 2^5820821909 is an apocalyptic number.

It is an amenable number.

5820821909 is a deficient number, since it is larger than the sum of its proper divisors (837956971).

5820821909 is a wasteful number, since it uses less digits than its factorization.

5820821909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801379.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 5820821909 is about 76294.3111181954. The cubic root of 5820821909 is about 1798.8492551203.

The spelling of 5820821909 in words is "five billion, eight hundred twenty million, eight hundred twenty-one thousand, nine hundred nine".