30551868418 has 4 divisors (see below), whose sum is σ = 45827802630. Its totient is φ = 15275934208.

The previous prime is 30551868397. The next prime is 30551868437. The reversal of 30551868418 is 81486815503.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81486815503 = 43 ⋅1895042221.

It can be written as a sum of positive squares in only one way, i.e., 30344594809 + 207273609 = 174197^2 + 14397^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7637967103 + ... + 7637967106.

Almost surely, 2^30551868418 is an apocalyptic number.

30551868418 is a deficient number, since it is larger than the sum of its proper divisors (15275934212).

30551868418 is a wasteful number, since it uses less digits than its factorization.

30551868418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15275934211.

The product of its (nonzero) digits is 921600, while the sum is 49.

The spelling of 30551868418 in words is "thirty billion, five hundred fifty-one million, eight hundred sixty-eight thousand, four hundred eighteen".