21116334 has 24 divisors (see below), whose sum is σ = 44577000. Its totient is φ = 6667632.

The previous prime is 21116317. The next prime is 21116351. The reversal of 21116334 is 43361112.

It is an interprime number because it is at equal distance from previous prime (21116317) and next prime (21116351).

It is a self number, because there is not a number n which added to its sum of digits gives 21116334.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2709 + ... + 7040.

It is an arithmetic number, because the mean of its divisors is an integer number (1857375).

Almost surely, 2^21116334 is an apocalyptic number.

21116334 is an abundant number, since it is smaller than the sum of its proper divisors (23460666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21116334 is a wasteful number, since it uses less digits than its factorization.

21116334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9792 (or 9773 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 21116334 is about 4595.2512444914. The cubic root of 21116334 is about 276.4009348333.

Adding to 21116334 its reverse (43361112), we get a palindrome (64477446).

The spelling of 21116334 in words is "twenty-one million, one hundred sixteen thousand, three hundred thirty-four".