21802248 has 48 divisors (see below), whose sum is σ = 63592620. Its totient is φ = 6708096.

The previous prime is 21802243. The next prime is 21802259. The reversal of 21802248 is 84220812.

It can be written as a sum of positive squares in 2 ways, for example, as 16793604 + 5008644 = 4098^2 + 2238^2 .

It is not an unprimeable number, because it can be changed into a prime (21802243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10711 + ... + 12582.

Almost surely, 2^21802248 is an apocalyptic number.

It is an amenable number.

21802248 is an abundant number, since it is smaller than the sum of its proper divisors (41790372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21802248 is a wasteful number, since it uses less digits than its factorization.

21802248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23318 (or 23311 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 21802248 is about 4669.2877401163. The cubic root of 21802248 is about 279.3618459942.

The spelling of 21802248 in words is "twenty-one million, eight hundred two thousand, two hundred forty-eight".