18975000 has 192 divisors, whose sum is σ = 67495680. Its totient is φ = 4400000.

The previous prime is 18974987. The next prime is 18975013. The reversal of 18975000 is 57981.

It is an interprime number because it is at equal distance from previous prime (18974987) and next prime (18975013).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 824989 + ... + 825011.

It is an arithmetic number, because the mean of its divisors is an integer number (351540).

Almost surely, 2^18975000 is an apocalyptic number.

18975000 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 18975000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33747840).

18975000 is an abundant number, since it is smaller than the sum of its proper divisors (48520680).

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

18975000 is a wasteful number, since it uses less digits than its factorization.

18975000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 18975000 is about 4356.0303029249. The cubic root of 18975000 is about 266.7230783434.

The spelling of 18975000 in words is "eighteen million, nine hundred seventy-five thousand".