21219348 has 24 divisors (see below), whose sum is σ = 50192128. Its totient is φ = 6975936.

The previous prime is 21219343. The next prime is 21219361. The reversal of 21219348 is 84391212.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21219343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11236 + ... + 12987.

Almost surely, 2^21219348 is an apocalyptic number.

It is an amenable number.

21219348 is an abundant number, since it is smaller than the sum of its proper divisors (28972780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21219348 is a wasteful number, since it uses less digits than its factorization.

21219348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24303 (or 24301 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 21219348 is about 4606.4463526671. The cubic root of 21219348 is about 276.8496710231.

The spelling of 21219348 in words is "twenty-one million, two hundred nineteen thousand, three hundred forty-eight".