21248362 has 4 divisors (see below), whose sum is σ = 31872546. Its totient is φ = 10624180.

The previous prime is 21248309. The next prime is 21248363. The reversal of 21248362 is 26384212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15531481 + 5716881 = 3941^2 + 2391^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21248362.

It is not an unprimeable number, because it can be changed into a prime (21248363) 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 as a sum of consecutive naturals, namely, 5312089 + ... + 5312092.

Almost surely, 2^21248362 is an apocalyptic number.

21248362 is a deficient number, since it is larger than the sum of its proper divisors (10624184).

21248362 is a wasteful number, since it uses less digits than its factorization.

21248362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10624183.

The product of its digits is 4608, while the sum is 28.

The square root of 21248362 is about 4609.5945591776. The cubic root of 21248362 is about 276.9757958233.

The spelling of 21248362 in words is "twenty-one million, two hundred forty-eight thousand, three hundred sixty-two".