21140611 has 8 divisors (see below), whose sum is σ = 22199040. Its totient is φ = 20093832.

The previous prime is 21140599. The next prime is 21140621. The reversal of 21140611 is 11604112.

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

It is a cyclic number.

It is not a de Polignac number, because 21140611 - 2¹¹ = 21138563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21140621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 930 + ... + 6568.

It is an arithmetic number, because the mean of its divisors is an integer number (2774880).

Almost surely, 2^21140611 is an apocalyptic number.

21140611 is a deficient number, since it is larger than the sum of its proper divisors (1058429).

21140611 is a wasteful number, since it uses less digits than its factorization.

21140611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5825.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 21140611 is about 4597.8920170008. The cubic root of 21140611 is about 276.5068183580.

Adding to 21140611 its reverse (11604112), we get a palindrome (32744723).

The spelling of 21140611 in words is "twenty-one million, one hundred forty thousand, six hundred eleven".