21795339 has 8 divisors (see below), whose sum is σ = 29270080. Its totient is φ = 14425416.

The previous prime is 21795311. The next prime is 21795341. The reversal of 21795339 is 93359712.

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

It is not a de Polignac number, because 21795339 - 2⁵ = 21795307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21795297 and 21795306.

It is not an unprimeable number, because it can be changed into a prime (21795379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25717 + ... + 26550.

It is an arithmetic number, because the mean of its divisors is an integer number (3658760).

Almost surely, 2^21795339 is an apocalyptic number.

21795339 is a deficient number, since it is larger than the sum of its proper divisors (7474741).

21795339 is a wasteful number, since it uses less digits than its factorization.

21795339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52409.

The product of its digits is 51030, while the sum is 39.

The square root of 21795339 is about 4668.5478470291. The cubic root of 21795339 is about 279.3323335190.

The spelling of 21795339 in words is "twenty-one million, seven hundred ninety-five thousand, three hundred thirty-nine".