21113002534 has 8 divisors (see below), whose sum is σ = 34105619520. Its totient is φ = 9744462696.

The previous prime is 21113002517. The next prime is 21113002541. The reversal of 21113002534 is 43520031112.

It is a happy number.

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, 406019254 + ... + 406019305.

It is an arithmetic number, because the mean of its divisors is an integer number (4263202440).

Almost surely, 2^21113002534 is an apocalyptic number.

21113002534 is a deficient number, since it is larger than the sum of its proper divisors (12992616986).

21113002534 is a wasteful number, since it uses less digits than its factorization.

21113002534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812038574.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 21113002534 its reverse (43520031112), we get a palindrome (64633033646).

The spelling of 21113002534 in words is "twenty-one billion, one hundred thirteen million, two thousand, five hundred thirty-four".