21412843 has 8 divisors (see below), whose sum is σ = 22800960. Its totient is φ = 20039040.

The previous prime is 21412837. The next prime is 21412849. The reversal of 21412843 is 34821412.

It is an interprime number because it is at equal distance from previous prime (21412837) and next prime (21412849).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21412843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21412849) 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, 403 + ... + 6556.

It is an arithmetic number, because the mean of its divisors is an integer number (2850120).

Almost surely, 2^21412843 is an apocalyptic number.

21412843 is a deficient number, since it is larger than the sum of its proper divisors (1388117).

21412843 is a wasteful number, since it uses less digits than its factorization.

21412843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7157.

The product of its digits is 1536, while the sum is 25.

The square root of 21412843 is about 4627.4013225568. The cubic root of 21412843 is about 277.6886383432.

The spelling of 21412843 in words is "twenty-one million, four hundred twelve thousand, eight hundred forty-three".