21935368 has 64 divisors (see below), whose sum is σ = 52416000. Its totient is φ = 8370432.

The previous prime is 21935357. The next prime is 21935371. The reversal of 21935368 is 86353912.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20593 + ... + 21631.

It is an arithmetic number, because the mean of its divisors is an integer number (819000).

Almost surely, 2^21935368 is an apocalyptic number.

21935368 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21935368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26208000).

21935368 is an abundant number, since it is smaller than the sum of its proper divisors (30480632).

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

21935368 is a wasteful number, since it uses less digits than its factorization.

21935368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094 (or 1090 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 21935368 is about 4683.5208977862. The cubic root of 21935368 is about 279.9292678478.

The spelling of 21935368 in words is "twenty-one million, nine hundred thirty-five thousand, three hundred sixty-eight".