21339354 has 32 divisors (see below), whose sum is σ = 44789760. Its totient is φ = 6764912.

The previous prime is 21339349. The next prime is 21339371. The reversal of 21339354 is 45393312.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 32659 + ... + 33305.

It is an arithmetic number, because the mean of its divisors is an integer number (1399680).

Almost surely, 2^21339354 is an apocalyptic number.

21339354 is an abundant number, since it is smaller than the sum of its proper divisors (23450406).

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

21339354 is a wasteful number, since it uses less digits than its factorization.

21339354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914.

The product of its digits is 9720, while the sum is 30.

The square root of 21339354 is about 4619.4538638242. The cubic root of 21339354 is about 277.3705978932.

The spelling of 21339354 in words is "twenty-one million, three hundred thirty-nine thousand, three hundred fifty-four".