21748652 has 6 divisors (see below), whose sum is σ = 38060148. Its totient is φ = 10874324.

The previous prime is 21748651. The next prime is 21748687. The reversal of 21748652 is 25684712.

It is not an unprimeable number, because it can be changed into a prime (21748651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2718578 + ... + 2718585.

It is an arithmetic number, because the mean of its divisors is an integer number (6343358).

Almost surely, 2^21748652 is an apocalyptic number.

It is an amenable number.

21748652 is a deficient number, since it is larger than the sum of its proper divisors (16311496).

21748652 is a wasteful number, since it uses less digits than its factorization.

21748652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5437167 (or 5437165 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 21748652 is about 4663.5450035354. The cubic root of 21748652 is about 279.1327417403.

The spelling of 21748652 in words is "twenty-one million, seven hundred forty-eight thousand, six hundred fifty-two".