21246448 has 10 divisors (see below), whose sum is σ = 41165024. Its totient is φ = 10623216.

The previous prime is 21246443. The next prime is 21246469. The reversal of 21246448 is 84464212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21246443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663936 + ... + 663967.

Almost surely, 2^21246448 is an apocalyptic number.

It is an amenable number.

21246448 is a deficient number, since it is larger than the sum of its proper divisors (19918576).

21246448 is a wasteful number, since it uses less digits than its factorization.

21246448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327911 (or 1327905 counting only the distinct ones).

The product of its digits is 12288, while the sum is 31.

The square root of 21246448 is about 4609.3869440523. The cubic root of 21246448 is about 276.9674791416.

The spelling of 21246448 in words is "twenty-one million, two hundred forty-six thousand, four hundred forty-eight".