30188899187 has 2 divisors, whose sum is σ = 30188899188. Its totient is φ = 30188899186.

The previous prime is 30188899157. The next prime is 30188899199. The reversal of 30188899187 is 78199888103.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30188899187 is a prime.

It is a super-2 number, since 2×30188899187² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30188899157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15094449593 + 15094449594.

It is an arithmetic number, because the mean of its divisors is an integer number (15094449594).

Almost surely, 2^30188899187 is an apocalyptic number.

30188899187 is a deficient number, since it is larger than the sum of its proper divisors (1).

30188899187 is an equidigital number, since it uses as much as digits as its factorization.

30188899187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6967296, while the sum is 62.

The spelling of 30188899187 in words is "thirty billion, one hundred eighty-eight million, eight hundred ninety-nine thousand, one hundred eighty-seven".