30802832821 has 4 divisors (see below), whose sum is σ = 31864999500. Its totient is φ = 29740666144.

The previous prime is 30802832803. The next prime is 30802832849. The reversal of 30802832821 is 12823820803.

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 23975115921 + 6827716900 = 154839^2 + 82630^2 .

It is a cyclic number.

It is not a de Polignac number, because 30802832821 - 2¹³ = 30802824629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30802832891) 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, 531083296 + ... + 531083353.

It is an arithmetic number, because the mean of its divisors is an integer number (7966249875).

Almost surely, 2^30802832821 is an apocalyptic number.

It is an amenable number.

30802832821 is a deficient number, since it is larger than the sum of its proper divisors (1062166679).

30802832821 is a wasteful number, since it uses less digits than its factorization.

30802832821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062166678.

The product of its (nonzero) digits is 36864, while the sum is 37.

The spelling of 30802832821 in words is "thirty billion, eight hundred two million, eight hundred thirty-two thousand, eight hundred twenty-one".