21343110 has 16 divisors (see below), whose sum is σ = 51223536. Its totient is φ = 5691488.

The previous prime is 21343039. The next prime is 21343111. The reversal of 21343110 is 1134312.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21343110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355689 + ... + 355748.

It is an arithmetic number, because the mean of its divisors is an integer number (3201471).

Almost surely, 2^21343110 is an apocalyptic number.

21343110 is an abundant number, since it is smaller than the sum of its proper divisors (29880426).

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

21343110 is a wasteful number, since it uses less digits than its factorization.

21343110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711447.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 21343110 is about 4619.8603875009. The cubic root of 21343110 is about 277.3868705327.

Adding to 21343110 its reverse (1134312), we get a palindrome (22477422).

The spelling of 21343110 in words is "twenty-one million, three hundred forty-three thousand, one hundred ten".