21795479 has 8 divisors (see below), whose sum is σ = 23701968. Its totient is φ = 19958400.

The previous prime is 21795469. The next prime is 21795481. The reversal of 21795479 is 97459712.

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 21795479 - 2⁴ = 21795463 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 (21795469) 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, 16697 + ... + 17954.

It is an arithmetic number, because the mean of its divisors is an integer number (2962746).

Almost surely, 2^21795479 is an apocalyptic number.

21795479 is a deficient number, since it is larger than the sum of its proper divisors (1906489).

21795479 is a wasteful number, since it uses less digits than its factorization.

21795479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34705.

The product of its digits is 158760, while the sum is 44.

The square root of 21795479 is about 4668.5628409608. The cubic root of 21795479 is about 279.3329316047.

The spelling of 21795479 in words is "twenty-one million, seven hundred ninety-five thousand, four hundred seventy-nine".