1816689914 has 32 divisors (see below), whose sum is σ = 3093914880. Its totient is φ = 793723392.

The previous prime is 1816689881. The next prime is 1816689947. The reversal of 1816689914 is 4199866181.

It is an interprime number because it is at equal distance from previous prime (1816689881) and next prime (1816689947).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42347 + ... + 73665.

It is an arithmetic number, because the mean of its divisors is an integer number (96684840).

Almost surely, 2^1816689914 is an apocalyptic number.

1816689914 is a deficient number, since it is larger than the sum of its proper divisors (1277224966).

1816689914 is a wasteful number, since it uses less digits than its factorization.

1816689914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31454.

The product of its digits is 746496, while the sum is 53.

The square root of 1816689914 is about 42622.6455537429. The cubic root of 1816689914 is about 1220.1885209882.

The spelling of 1816689914 in words is "one billion, eight hundred sixteen million, six hundred eighty-nine thousand, nine hundred fourteen".