30932278813 has 4 divisors (see below), whose sum is σ = 31087717600. Its totient is φ = 30776840028.

The previous prime is 30932278799. The next prime is 30932278823. The reversal of 30932278813 is 31887223903.

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: 31887223903 = 5323 ⋅5990461.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30932278813 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 (30932278823) 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, 77719095 + ... + 77719492.

It is an arithmetic number, because the mean of its divisors is an integer number (7771929400).

Almost surely, 2^30932278813 is an apocalyptic number.

It is an amenable number.

30932278813 is a deficient number, since it is larger than the sum of its proper divisors (155438787).

30932278813 is a wasteful number, since it uses less digits than its factorization.

30932278813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155438786.

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 30932278813 in words is "thirty billion, nine hundred thirty-two million, two hundred seventy-eight thousand, eight hundred thirteen".