30388818813 has 4 divisors (see below), whose sum is σ = 40518425088. Its totient is φ = 20259212540.

The previous prime is 30388818791. The next prime is 30388818841. The reversal of 30388818813 is 31881888303.

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.

It is a cyclic number.

It is not a de Polignac number, because 30388818813 - 2⁵ = 30388818781 is a prime.

It is a super-3 number, since 3×30388818813³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30388818883) 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, 5064803133 + ... + 5064803138.

It is an arithmetic number, because the mean of its divisors is an integer number (10129606272).

Almost surely, 2^30388818813 is an apocalyptic number.

It is an amenable number.

30388818813 is a deficient number, since it is larger than the sum of its proper divisors (10129606275).

30388818813 is a wasteful number, since it uses less digits than its factorization.

30388818813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10129606274.

The product of its (nonzero) digits is 884736, while the sum is 51.

The spelling of 30388818813 in words is "thirty billion, three hundred eighty-eight million, eight hundred eighteen thousand, eight hundred thirteen".