21948296 has 16 divisors (see below), whose sum is σ = 41431500. Its totient is φ = 10899904.

The previous prime is 21948293. The next prime is 21948299. The reversal of 21948296 is 69284912.

It is an interprime number because it is at equal distance from previous prime (21948293) and next prime (21948299).

It can be written as a sum of positive squares in 2 ways, for example, as 19483396 + 2464900 = 4414^2 + 1570^2 .

It is not an unprimeable number, because it can be changed into a prime (21948293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8015 + ... + 10398.

Almost surely, 2^21948296 is an apocalyptic number.

It is an amenable number.

21948296 is a deficient number, since it is larger than the sum of its proper divisors (19483204).

21948296 is a wasteful number, since it uses less digits than its factorization.

21948296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18568 (or 18564 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The square root of 21948296 is about 4684.9008527396. The cubic root of 21948296 is about 279.9842508149.

The spelling of 21948296 in words is "twenty-one million, nine hundred forty-eight thousand, two hundred ninety-six".