21338159 has 16 divisors (see below), whose sum is σ = 23347200. Its totient is φ = 19432224.

The previous prime is 21338153. The next prime is 21338183. The reversal of 21338159 is 95183312.

It is a cyclic number.

It is not a de Polignac number, because 21338159 - 2⁴ = 21338143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21338153) 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, 89162 + ... + 89400.

It is an arithmetic number, because the mean of its divisors is an integer number (1459200).

Almost surely, 2^21338159 is an apocalyptic number.

21338159 is a deficient number, since it is larger than the sum of its proper divisors (2009041).

21338159 is a wasteful number, since it uses less digits than its factorization.

21338159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422.

The product of its digits is 6480, while the sum is 32.

The square root of 21338159 is about 4619.3245177190. The cubic root of 21338159 is about 277.3654202286.

The spelling of 21338159 in words is "twenty-one million, three hundred thirty-eight thousand, one hundred fifty-nine".