21193485 has 16 divisors (see below), whose sum is σ = 33975936. Its totient is φ = 11281088.

The previous prime is 21193463. The next prime is 21193541. The reversal of 21193485 is 58439112.

It is a cyclic number.

It is not a de Polignac number, because 21193485 - 2⁷ = 21193357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9112 + ... + 11198.

It is an arithmetic number, because the mean of its divisors is an integer number (2123496).

Almost surely, 2^21193485 is an apocalyptic number.

It is an amenable number.

21193485 is a deficient number, since it is larger than the sum of its proper divisors (12782451).

21193485 is a wasteful number, since it uses less digits than its factorization.

21193485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2772.

The product of its digits is 8640, while the sum is 33.

The square root of 21193485 is about 4603.6382351353. The cubic root of 21193485 is about 276.7371467670.

The spelling of 21193485 in words is "twenty-one million, one hundred ninety-three thousand, four hundred eighty-five".