21130040006 has 8 divisors (see below), whose sum is σ = 31724712480. Its totient is φ = 10555135848.

The previous prime is 21130039999. The next prime is 21130040069. The reversal of 21130040006 is 60004003112.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4939406 + ... + 4943681.

It is an arithmetic number, because the mean of its divisors is an integer number (3965589060).

Almost surely, 2^21130040006 is an apocalyptic number.

21130040006 is a deficient number, since it is larger than the sum of its proper divisors (10594672474).

21130040006 is a wasteful number, since it uses less digits than its factorization.

21130040006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9884158.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21130040006 its reverse (60004003112), we get a palindrome (81134043118).

The spelling of 21130040006 in words is "twenty-one billion, one hundred thirty million, forty thousand, six".