21331362 has 32 divisors (see below), whose sum is σ = 48650112. Its totient is φ = 6177024.

The previous prime is 21331361. The next prime is 21331363. The reversal of 21331362 is 26313312.

It is an interprime number because it is at equal distance from previous prime (21331361) and next prime (21331363).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21331361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6718 + ... + 9369.

It is an arithmetic number, because the mean of its divisors is an integer number (1520316).

Almost surely, 2^21331362 is an apocalyptic number.

21331362 is an abundant number, since it is smaller than the sum of its proper divisors (27318750).

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

21331362 is a wasteful number, since it uses less digits than its factorization.

21331362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16122.

The product of its digits is 648, while the sum is 21.

The square root of 21331362 is about 4618.5887454936. The cubic root of 21331362 is about 277.3359666884.

Adding to 21331362 its reverse (26313312), we get a palindrome (47644674).

The spelling of 21331362 in words is "twenty-one million, three hundred thirty-one thousand, three hundred sixty-two".