21853298 has 16 divisors (see below), whose sum is σ = 34021080. Its totient is φ = 10515456.

The previous prime is 21853231. The next prime is 21853309. The reversal of 21853298 is 89235812.

It can be written as a sum of positive squares in 4 ways, for example, as 21224449 + 628849 = 4607^2 + 793^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 33140 + ... + 33792.

Almost surely, 2^21853298 is an apocalyptic number.

21853298 is a deficient number, since it is larger than the sum of its proper divisors (12167782).

21853298 is a wasteful number, since it uses less digits than its factorization.

21853298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261.

The product of its digits is 34560, while the sum is 38.

The square root of 21853298 is about 4674.7511163697. The cubic root of 21853298 is about 279.5797181091.

The spelling of 21853298 in words is "twenty-one million, eight hundred fifty-three thousand, two hundred ninety-eight".