18289700 has 72 divisors (see below), whose sum is σ = 46663680. Its totient is φ = 6134400.

The previous prime is 18289697. The next prime is 18289703. The reversal of 18289700 is 798281.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18289697) and next prime (18289703).

It is not an unprimeable number, because it can be changed into a prime (18289703) 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, 13661 + ... + 14939.

Almost surely, 2^18289700 is an apocalyptic number.

18289700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18289700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23331840).

18289700 is an abundant number, since it is smaller than the sum of its proper divisors (28373980).

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

18289700 is a wasteful number, since it uses less digits than its factorization.

18289700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317 (or 1310 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 18289700 is about 4276.6458819968. The cubic root of 18289700 is about 263.4726425563.

The spelling of 18289700 in words is "eighteen million, two hundred eighty-nine thousand, seven hundred".