21986095 has 8 divisors (see below), whose sum is σ = 26717760. Its totient is φ = 17365920.

The previous prime is 21986077. The next prime is 21986101. The reversal of 21986095 is 59068912.

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

It is not a de Polignac number, because 21986095 - 2²³ = 13597487 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27436 + ... + 28225.

It is an arithmetic number, because the mean of its divisors is an integer number (3339720).

Almost surely, 2^21986095 is an apocalyptic number.

21986095 is a deficient number, since it is larger than the sum of its proper divisors (4731665).

21986095 is an equidigital number, since it uses as much as digits as its factorization.

21986095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55745.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 21986095 is about 4688.9332475522. The cubic root of 21986095 is about 280.1448867497.

The spelling of 21986095 in words is "twenty-one million, nine hundred eighty-six thousand, ninety-five".