1818682099 has 4 divisors (see below), whose sum is σ = 1958580736. Its totient is φ = 1678783464.

The previous prime is 1818682097. The next prime is 1818682123. The reversal of 1818682099 is 9902868181.

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

It is a cyclic number.

It is not a de Polignac number, because 1818682099 - 2¹ = 1818682097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1818682097) 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, 69949299 + ... + 69949324.

It is an arithmetic number, because the mean of its divisors is an integer number (489645184).

Almost surely, 2^1818682099 is an apocalyptic number.

1818682099 is a deficient number, since it is larger than the sum of its proper divisors (139898637).

1818682099 is a wasteful number, since it uses less digits than its factorization.

1818682099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139898636.

The product of its (nonzero) digits is 497664, while the sum is 52.

The square root of 1818682099 is about 42646.0091802269. The cubic root of 1818682099 is about 1220.6343782652.

The spelling of 1818682099 in words is "one billion, eight hundred eighteen million, six hundred eighty-two thousand, ninety-nine".