21346017 has 48 divisors (see below), whose sum is σ = 37078272. Its totient is φ = 10795680.

The previous prime is 21346009. The next prime is 21346019. The reversal of 21346017 is 71064312.

It is not a de Polignac number, because 21346017 - 2³ = 21346009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21346019) 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 47 ways as a sum of consecutive naturals, for example, 69378 + ... + 69684.

It is an arithmetic number, because the mean of its divisors is an integer number (772464).

Almost surely, 2^21346017 is an apocalyptic number.

It is an amenable number.

21346017 is a deficient number, since it is larger than the sum of its proper divisors (15732255).

21346017 is a wasteful number, since it uses less digits than its factorization.

21346017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 21346017 is about 4620.1749966857. The cubic root of 21346017 is about 277.3994636213.

The spelling of 21346017 in words is "twenty-one million, three hundred forty-six thousand, seventeen".