21047095 has 8 divisors (see below), whose sum is σ = 25733376. Its totient is φ = 16519776.

The previous prime is 21047077. The next prime is 21047099. The reversal of 21047095 is 59074012.

It is a happy number.

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 21047095 - 2⁷ = 21046967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21047099) 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, 39447 + ... + 39976.

It is an arithmetic number, because the mean of its divisors is an integer number (3216672).

Almost surely, 2^21047095 is an apocalyptic number.

21047095 is a deficient number, since it is larger than the sum of its proper divisors (4686281).

21047095 is an equidigital number, since it uses as much as digits as its factorization.

21047095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79481.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 21047095 is about 4587.7113030355. The cubic root of 21047095 is about 276.0985041872.

The spelling of 21047095 in words is "twenty-one million, forty-seven thousand, ninety-five".