18012821002 has 64 divisors (see below), whose sum is σ = 32966258688. Its totient is φ = 7283808000.

The previous prime is 18012820981. The next prime is 18012821039. The reversal of 18012821002 is 20012821081.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 480477 + ... + 516607.

It is an arithmetic number, because the mean of its divisors is an integer number (515097792).

Almost surely, 2^18012821002 is an apocalyptic number.

18012821002 is a deficient number, since it is larger than the sum of its proper divisors (14953437686).

18012821002 is a wasteful number, since it uses less digits than its factorization.

18012821002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36235.

The product of its (nonzero) digits is 512, while the sum is 25.

The spelling of 18012821002 in words is "eighteen billion, twelve million, eight hundred twenty-one thousand, two".