825530018 has 4 divisors (see below), whose sum is σ = 1238295030. Its totient is φ = 412765008.

The previous prime is 825530011. The next prime is 825530029. The reversal of 825530018 is 810035528.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 604323889 + 221206129 = 24583^2 + 14873^2 .

It is not an unprimeable number, because it can be changed into a prime (825530011) 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 as a sum of consecutive naturals, namely, 206382503 + ... + 206382506.

Almost surely, 2^825530018 is an apocalyptic number.

825530018 is a deficient number, since it is larger than the sum of its proper divisors (412765012).

825530018 is a wasteful number, since it uses less digits than its factorization.

825530018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412765011.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 825530018 is about 28732.0381804006. The cubic root of 825530018 is about 938.0895323270.

The spelling of 825530018 in words is "eight hundred twenty-five million, five hundred thirty thousand, eighteen".