21343662 has 28 divisors (see below), whose sum is σ = 48004560. Its totient is φ = 7114068.

The previous prime is 21343661. The next prime is 21343691. The reversal of 21343662 is 26634312.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343661) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 5862 + ... + 8777.

Almost surely, 2^21343662 is an apocalyptic number.

21343662 is an abundant number, since it is smaller than the sum of its proper divisors (26660898).

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

21343662 is an equidigital number, since it uses as much as digits as its factorization.

21343662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14659 (or 14644 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 21343662 is about 4619.9201291797. The cubic root of 21343662 is about 277.3892618780.

Adding to 21343662 its reverse (26634312), we get a palindrome (47977974).

The spelling of 21343662 in words is "twenty-one million, three hundred forty-three thousand, six hundred sixty-two".