16918071850 has 48 divisors (see below), whose sum is σ = 31782887640. Its totient is φ = 6699571200.

The previous prime is 16918071817. The next prime is 16918071851. The reversal of 16918071850 is 5817081961.

It can be written as a sum of positive squares in 12 ways, for example, as 301057201 + 16617014649 = 17351^2 + 128907^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16918071850.

It is not an unprimeable number, because it can be changed into a prime (16918071851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9089920 + ... + 9091780.

Almost surely, 2^16918071850 is an apocalyptic number.

16918071850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16918071850 is a deficient number, since it is larger than the sum of its proper divisors (14864815790).

16918071850 is a wasteful number, since it uses less digits than its factorization.

16918071850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3595 (or 3590 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 46.

The spelling of 16918071850 in words is "sixteen billion, nine hundred eighteen million, seventy-one thousand, eight hundred fifty".