30999999999986 has 4 divisors (see below), whose sum is σ = 46499999999982. Its totient is φ = 15499999999992.

The previous prime is 30999999999977. The next prime is 31000000000009. The reversal of 30999999999986 is 68999999999903.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17494602849025 + 13505397150961 = 4182655^2 + 3674969^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7749999999995 + ... + 7749999999998.

Almost surely, 2^{30999999999986} is an apocalyptic number.

30999999999986 is a deficient number, since it is larger than the sum of its proper divisors (15499999999996).

30999999999986 is a wasteful number, since it uses less digits than its factorization.

30999999999986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15499999999995.

The product of its (nonzero) digits is 502096953744, while the sum is 107.

The spelling of 30999999999986 in words is "thirty trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred eighty-six".