21366095 has 8 divisors (see below), whose sum is σ = 25665120. Its totient is φ = 17075680.

The previous prime is 21366091. The next prime is 21366097. The reversal of 21366095 is 59066312.

It is a happy number.

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

It is not a de Polignac number, because 21366095 - 2² = 21366091 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21366091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6425 + ... + 9165.

It is an arithmetic number, because the mean of its divisors is an integer number (3208140).

Almost surely, 2^21366095 is an apocalyptic number.

21366095 is a deficient number, since it is larger than the sum of its proper divisors (4299025).

21366095 is a wasteful number, since it uses less digits than its factorization.

21366095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4305.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 21366095 is about 4622.3473473983. The cubic root of 21366095 is about 277.4864100695.

The spelling of 21366095 in words is "twenty-one million, three hundred sixty-six thousand, ninety-five".