21342332 has 12 divisors (see below), whose sum is σ = 40744536. Its totient is φ = 9701040.

The previous prime is 21342331. The next prime is 21342337. The reversal of 21342332 is 23324312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242483 + ... + 242570.

It is an arithmetic number, because the mean of its divisors is an integer number (3395378).

Almost surely, 2^21342332 is an apocalyptic number.

21342332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21342332 is a deficient number, since it is larger than the sum of its proper divisors (19402204).

21342332 is a wasteful number, since it uses less digits than its factorization.

21342332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485068 (or 485066 counting only the distinct ones).

The product of its digits is 864, while the sum is 20.

The square root of 21342332 is about 4619.7761850549. The cubic root of 21342332 is about 277.3835000522.

Adding to 21342332 its reverse (23324312), we get a palindrome (44666644).

The spelling of 21342332 in words is "twenty-one million, three hundred forty-two thousand, three hundred thirty-two".