21341838 has 32 divisors (see below), whose sum is σ = 50904576. Its totient is φ = 5832288.

The previous prime is 21341833. The next prime is 21341839. The reversal of 21341838 is 83814312.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21341833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10081 + ... + 12012.

It is an arithmetic number, because the mean of its divisors is an integer number (1590768).

Almost surely, 2^21341838 is an apocalyptic number.

21341838 is an abundant number, since it is smaller than the sum of its proper divisors (29562738).

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

21341838 is a wasteful number, since it uses less digits than its factorization.

21341838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22128.

The product of its digits is 4608, while the sum is 30.

The square root of 21341838 is about 4619.7227189519. The cubic root of 21341838 is about 277.3813598846.

The spelling of 21341838 in words is "twenty-one million, three hundred forty-one thousand, eight hundred thirty-eight".