21948452 has 12 divisors (see below), whose sum is σ = 38443440. Its totient is φ = 10964616.

The previous prime is 21948427. The next prime is 21948457. The reversal of 21948452 is 25484912.

It is not an unprimeable number, because it can be changed into a prime (21948457) by changing a digit.

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, 5999 + ... + 8937.

It is an arithmetic number, because the mean of its divisors is an integer number (3203620).

Almost surely, 2^21948452 is an apocalyptic number.

It is an amenable number.

21948452 is a deficient number, since it is larger than the sum of its proper divisors (16494988).

21948452 is a wasteful number, since it uses less digits than its factorization.

21948452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4810 (or 4808 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 21948452 is about 4684.9175019417. The cubic root of 21948452 is about 279.9849141532.

The spelling of 21948452 in words is "twenty-one million, nine hundred forty-eight thousand, four hundred fifty-two".