18525570 has 64 divisors (see below), whose sum is σ = 53498880. Its totient is φ = 4010688.

The previous prime is 18525553. The next prime is 18525571. The reversal of 18525570 is 7552581.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18525571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1669 + ... + 6311.

It is an arithmetic number, because the mean of its divisors is an integer number (835920).

Almost surely, 2^18525570 is an apocalyptic number.

18525570 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 18525570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26749440).

18525570 is an abundant number, since it is smaller than the sum of its proper divisors (34973310).

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

18525570 is a wasteful number, since it uses less digits than its factorization.

18525570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4679.

The product of its (nonzero) digits is 14000, while the sum is 33.

The square root of 18525570 is about 4304.1340592505. The cubic root of 18525570 is about 264.6004183207.

The spelling of 18525570 in words is "eighteen million, five hundred twenty-five thousand, five hundred seventy".