21193448 has 16 divisors (see below), whose sum is σ = 39843780. Its totient is φ = 10568448.

The previous prime is 21193427. The next prime is 21193463. The reversal of 21193448 is 84439112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20268004 + 925444 = 4502^2 + 962^2 .

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 3 ways as a sum of consecutive naturals, for example, 161 + ... + 6512.

Almost surely, 2^21193448 is an apocalyptic number.

It is an amenable number.

21193448 is a deficient number, since it is larger than the sum of its proper divisors (18650332).

21193448 is a wasteful number, since it uses less digits than its factorization.

21193448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7076 (or 7072 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 21193448 is about 4603.6342165728. The cubic root of 21193448 is about 276.7369857225.

The spelling of 21193448 in words is "twenty-one million, one hundred ninety-three thousand, four hundred forty-eight".