21014479 has 8 divisors (see below), whose sum is σ = 22135680. Its totient is φ = 19910616.

The previous prime is 21014471. The next prime is 21014501. The reversal of 21014479 is 97441012.

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 21014479 - 2³ = 21014471 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 (21014471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1809 + ... + 6730.

It is an arithmetic number, because the mean of its divisors is an integer number (2766960).

Almost surely, 2^21014479 is an apocalyptic number.

21014479 is a deficient number, since it is larger than the sum of its proper divisors (1121201).

21014479 is a wasteful number, since it uses less digits than its factorization.

21014479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8669.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 21014479 is about 4584.1552111594. The cubic root of 21014479 is about 275.9558101555.

The spelling of 21014479 in words is "twenty-one million, fourteen thousand, four hundred seventy-nine".