21339355 has 8 divisors (see below), whose sum is σ = 25632432. Its totient is φ = 17054688.

The previous prime is 21339349. The next prime is 21339371. The reversal of 21339355 is 55393312.

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

It is a cyclic number.

It is not a de Polignac number, because 21339355 - 2⁵ = 21339323 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7377 + ... + 9853.

It is an arithmetic number, because the mean of its divisors is an integer number (3204054).

Almost surely, 2^21339355 is an apocalyptic number.

21339355 is a deficient number, since it is larger than the sum of its proper divisors (4293077).

21339355 is a wasteful number, since it uses less digits than its factorization.

21339355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4205.

The product of its digits is 12150, while the sum is 31.

The square root of 21339355 is about 4619.4539720621. The cubic root of 21339355 is about 277.3706022259.

The spelling of 21339355 in words is "twenty-one million, three hundred thirty-nine thousand, three hundred fifty-five".