21330395 has 8 divisors (see below), whose sum is σ = 25920960. Its totient is φ = 16848000.

The previous prime is 21330391. The next prime is 21330403. The reversal of 21330395 is 59303312.

21330395 = T₆₉₅ + T₆₉₆ + ... + T₇₇₃.

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

It is not a de Polignac number, because 21330395 - 2² = 21330391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21330391) 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, 26606 + ... + 27395.

It is an arithmetic number, because the mean of its divisors is an integer number (3240120).

Almost surely, 2^21330395 is an apocalyptic number.

21330395 is a deficient number, since it is larger than the sum of its proper divisors (4590565).

21330395 is an equidigital number, since it uses as much as digits as its factorization.

21330395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54085.

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 21330395 is about 4618.4840586495. The cubic root of 21330395 is about 277.3317758647.

The spelling of 21330395 in words is "twenty-one million, three hundred thirty thousand, three hundred ninety-five".