21462343 has 12 divisors (see below), whose sum is σ = 26281560. Its totient is φ = 17427312.

The previous prime is 21462319. The next prime is 21462359. The reversal of 21462343 is 34326412.

It is not a de Polignac number, because 21462343 - 2⁹ = 21461831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21462383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10596 + ... + 12457.

It is an arithmetic number, because the mean of its divisors is an integer number (2190130).

Almost surely, 2^21462343 is an apocalyptic number.

21462343 is a deficient number, since it is larger than the sum of its proper divisors (4819217).

21462343 is a wasteful number, since it uses less digits than its factorization.

21462343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23086 (or 23079 counting only the distinct ones).

The product of its digits is 3456, while the sum is 25.

The square root of 21462343 is about 4632.7468093994. The cubic root of 21462343 is about 277.9024509805.

Adding to 21462343 its reverse (34326412), we get a palindrome (55788755).

It can be divided in two parts, 2146 and 2343, that added together give a square (4489 = 67²).

The spelling of 21462343 in words is "twenty-one million, four hundred sixty-two thousand, three hundred forty-three".