30203912813 has 4 divisors (see below), whose sum is σ = 30486192480. Its totient is φ = 29921633148.

The previous prime is 30203912807. The next prime is 30203912819. The reversal of 30203912813 is 31821930203.

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 an interprime number because it is at equal distance from previous prime (30203912807) and next prime (30203912819).

It is a cyclic number.

It is not a de Polignac number, because 30203912813 - 2¹⁶ = 30203847277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30203912813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30203912819) 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, 141139673 + ... + 141139886.

It is an arithmetic number, because the mean of its divisors is an integer number (7621548120).

Almost surely, 2^30203912813 is an apocalyptic number.

It is an amenable number.

30203912813 is a deficient number, since it is larger than the sum of its proper divisors (282279667).

30203912813 is a wasteful number, since it uses less digits than its factorization.

30203912813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282279666.

The product of its (nonzero) digits is 7776, while the sum is 32.

The spelling of 30203912813 in words is "thirty billion, two hundred three million, nine hundred twelve thousand, eight hundred thirteen".