18698850 has 120 divisors (see below), whose sum is σ = 54914640. Its totient is φ = 4723920.

The previous prime is 18698807. The next prime is 18698891. The reversal of 18698850 is 5889681.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 18698796 and 18698805.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 984141 + ... + 984159.

It is an arithmetic number, because the mean of its divisors is an integer number (457622).

Almost surely, 2^18698850 is an apocalyptic number.

18698850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18698850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27457320).

18698850 is an abundant number, since it is smaller than the sum of its proper divisors (36215790).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18698850 is an frugal number, since it uses more digits than its factorization.

18698850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58 (or 29 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 18698850 is about 4324.2166920727. The cubic root of 18698850 is about 265.4228445727.

The spelling of 18698850 in words is "eighteen million, six hundred ninety-eight thousand, eight hundred fifty".