21848402 has 12 divisors (see below), whose sum is σ = 33411210. Its totient is φ = 10715328.

The previous prime is 21848401. The next prime is 21848441. The reversal of 21848402 is 20484812.

It can be written as a sum of positive squares in 3 ways, for example, as 21799561 + 48841 = 4669^2 + 221^2 .

It is not an unprimeable number, because it can be changed into a prime (21848401) 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 in 5 ways as a sum of consecutive naturals, for example, 3674 + ... + 7562.

Almost surely, 2^21848402 is an apocalyptic number.

21848402 is a deficient number, since it is larger than the sum of its proper divisors (11562808).

21848402 is an equidigital number, since it uses as much as digits as its factorization.

21848402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3997 (or 3944 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 21848402 is about 4674.2274227941. The cubic root of 21848402 is about 279.5588375913.

The spelling of 21848402 in words is "twenty-one million, eight hundred forty-eight thousand, four hundred two".