21347026 has 8 divisors (see below), whose sum is σ = 32563440. Its totient is φ = 10492548.

The previous prime is 21347017. The next prime is 21347041. The reversal of 21347026 is 62074312.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 90336 + ... + 90571.

It is an arithmetic number, because the mean of its divisors is an integer number (4070430).

Almost surely, 2^21347026 is an apocalyptic number.

21347026 is a deficient number, since it is larger than the sum of its proper divisors (11216414).

21347026 is a wasteful number, since it uses less digits than its factorization.

21347026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180968.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 21347026 is about 4620.2841903935. The cubic root of 21347026 is about 277.4038343297.

The spelling of 21347026 in words is "twenty-one million, three hundred forty-seven thousand, twenty-six".