18625530 has 96 divisors (see below), whose sum is σ = 56230272. Its totient is φ = 3864960.

The previous prime is 18625517. The next prime is 18625549. The reversal of 18625530 is 3552681.

18625530 = 293² + 294² + ... + 432².

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

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, 25044 + ... + 25776.

It is an arithmetic number, because the mean of its divisors is an integer number (585732).

Almost surely, 2^18625530 is an apocalyptic number.

18625530 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 18625530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28115136).

18625530 is an abundant number, since it is smaller than the sum of its proper divisors (37604742).

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

18625530 is a wasteful number, since it uses less digits than its factorization.

18625530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772 (or 761 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 18625530 is about 4315.7305291225. The cubic root of 18625530 is about 265.0754739338.

The spelling of 18625530 in words is "eighteen million, six hundred twenty-five thousand, five hundred thirty".