21134018181 has 8 divisors (see below), whose sum is σ = 28301742880. Its totient is φ = 14027819472.

The previous prime is 21134018083. The next prime is 21134018189. The reversal of 21134018181 is 18181043112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21134018181 - 2¹⁴ = 21134001797 is a prime.

It is a super-2 number, since 2×21134018181² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134018189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15380695 + ... + 15382068.

It is an arithmetic number, because the mean of its divisors is an integer number (3537717860).

Almost surely, 2^21134018181 is an apocalyptic number.

It is an amenable number.

21134018181 is a deficient number, since it is larger than the sum of its proper divisors (7167724699).

21134018181 is a wasteful number, since it uses less digits than its factorization.

21134018181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30762995.

The product of its (nonzero) digits is 1536, while the sum is 30.

The spelling of 21134018181 in words is "twenty-one billion, one hundred thirty-four million, eighteen thousand, one hundred eighty-one".