18752490 has 48 divisors (see below), whose sum is σ = 49140000. Its totient is φ = 4961376.

The previous prime is 18752477. The next prime is 18752491. The reversal of 18752490 is 9425781.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18752491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11761 + ... + 13259.

It is an arithmetic number, because the mean of its divisors is an integer number (1023750).

Almost surely, 2^18752490 is an apocalyptic number.

18752490 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 18752490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24570000).

18752490 is an abundant number, since it is smaller than the sum of its proper divisors (30387510).

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

18752490 is a wasteful number, since it uses less digits than its factorization.

18752490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651 (or 1648 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 18752490 is about 4330.4145298112. The cubic root of 18752490 is about 265.6764018633.

The spelling of 18752490 in words is "eighteen million, seven hundred fifty-two thousand, four hundred ninety".