18202530 has 32 divisors (see below), whose sum is σ = 43920000. Its totient is φ = 4828032.

The previous prime is 18202511. The next prime is 18202531. The reversal of 18202530 is 3520281.

It is a junction number, because it is equal to n+sod(n) for n = 18202497 and 18202506.

It is not an unprimeable number, because it can be changed into a prime (18202531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4446 + ... + 7494.

It is an arithmetic number, because the mean of its divisors is an integer number (1372500).

Almost surely, 2^18202530 is an apocalyptic number.

18202530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18202530 is an abundant number, since it is smaller than the sum of its proper divisors (25717470).

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

18202530 is a wasteful number, since it uses less digits than its factorization.

18202530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3258.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 18202530 is about 4266.4423118097. The cubic root of 18202530 is about 263.0533994035.

The spelling of 18202530 in words is "eighteen million, two hundred two thousand, five hundred thirty".