30795501821 has 12 divisors (see below), whose sum is σ = 36585540288. Its totient is φ = 25834522392.

The previous prime is 30795501809. The next prime is 30795501827. The reversal of 30795501821 is 12810559703.

It is a de Polignac number, because none of the positive numbers 2^k-30795501821 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 (30795501827) 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 11 ways as a sum of consecutive naturals, for example, 6683651 + ... + 6688256.

It is an arithmetic number, because the mean of its divisors is an integer number (3048795024).

Almost surely, 2^30795501821 is an apocalyptic number.

It is an amenable number.

30795501821 is a deficient number, since it is larger than the sum of its proper divisors (5790038467).

30795501821 is a wasteful number, since it uses less digits than its factorization.

30795501821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13371968 (or 13371961 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 41.

The spelling of 30795501821 in words is "thirty billion, seven hundred ninety-five million, five hundred one thousand, eight hundred twenty-one".