21018134182 has 4 divisors (see below), whose sum is σ = 31527201276. Its totient is φ = 10509067090.

The previous prime is 21018134167. The next prime is 21018134201. The reversal of 21018134182 is 28143181012.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5254533544 + ... + 5254533547.

It is an arithmetic number, because the mean of its divisors is an integer number (7881800319).

Almost surely, 2^21018134182 is an apocalyptic number.

21018134182 is a deficient number, since it is larger than the sum of its proper divisors (10509067094).

21018134182 is a wasteful number, since it uses less digits than its factorization.

21018134182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10509067093.

The product of its (nonzero) digits is 3072, while the sum is 31.

The spelling of 21018134182 in words is "twenty-one billion, eighteen million, one hundred thirty-four thousand, one hundred eighty-two".