21338854 has 4 divisors (see below), whose sum is σ = 32008284. Its totient is φ = 10669426.

The previous prime is 21338851. The next prime is 21338857. The reversal of 21338854 is 45883312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21338851) and next prime (21338857).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21338851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5334712 + ... + 5334715.

It is an arithmetic number, because the mean of its divisors is an integer number (8002071).

Almost surely, 2^21338854 is an apocalyptic number.

21338854 is a deficient number, since it is larger than the sum of its proper divisors (10669430).

21338854 is a wasteful number, since it uses less digits than its factorization.

21338854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10669429.

The product of its digits is 23040, while the sum is 34.

The square root of 21338854 is about 4619.3997445556. The cubic root of 21338854 is about 277.3684315298.

The spelling of 21338854 in words is "twenty-one million, three hundred thirty-eight thousand, eight hundred fifty-four".