21045358 has 8 divisors (see below), whose sum is σ = 32656680. Its totient is φ = 10159800.

The previous prime is 21045319. The next prime is 21045377. The reversal of 21045358 is 85354012.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181368 + ... + 181483.

It is an arithmetic number, because the mean of its divisors is an integer number (4082085).

Almost surely, 2^21045358 is an apocalyptic number.

21045358 is a deficient number, since it is larger than the sum of its proper divisors (11611322).

21045358 is a wasteful number, since it uses less digits than its factorization.

21045358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362882.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 21045358 is about 4587.5219890481. The cubic root of 21045358 is about 276.0909085817.

The spelling of 21045358 in words is "twenty-one million, forty-five thousand, three hundred fifty-eight".