18630000 has 250 divisors, whose sum is σ = 70308744. Its totient is φ = 4752000.

The previous prime is 18629999. The next prime is 18630037. The reversal of 18630000 is 3681.

It is a tau number, because it is divible by the number of its divisors (250).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 49 ways as a sum of consecutive naturals, for example, 809989 + ... + 810011.

Almost surely, 2^18630000 is an apocalyptic number.

18630000 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 18630000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35154372).

18630000 is an abundant number, since it is smaller than the sum of its proper divisors (51678744).

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

18630000 is an equidigital number, since it uses as much as digits as its factorization.

18630000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63 (or 33 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 18630000 is about 4316.2483709814. The cubic root of 18630000 is about 265.0966776721.

Adding to 18630000 its reverse (3681), we get a palindrome (18633681).

The spelling of 18630000 in words is "eighteen million, six hundred thirty thousand".