18499650 has 96 divisors (see below), whose sum is σ = 50621760. Its totient is φ = 4442880.

The previous prime is 18499643. The next prime is 18499661. The reversal of 18499650 is 5699481.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 103261 + ... + 103439.

It is an arithmetic number, because the mean of its divisors is an integer number (527310).

Almost surely, 2^18499650 is an apocalyptic number.

18499650 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 18499650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25310880).

18499650 is an abundant number, since it is smaller than the sum of its proper divisors (32122110).

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

18499650 is a wasteful number, since it uses less digits than its factorization.

18499650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 18499650 is about 4301.1219466553. The cubic root of 18499650 is about 264.4769557410.

The spelling of 18499650 in words is "eighteen million, four hundred ninety-nine thousand, six hundred fifty".