21414448 has 40 divisors (see below), whose sum is σ = 45528336. Its totient is φ = 9676800.

The previous prime is 21414431. The next prime is 21414457. The reversal of 21414448 is 84441412.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49240 + ... + 49672.

Almost surely, 2^21414448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21414448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22764168).

21414448 is an abundant number, since it is smaller than the sum of its proper divisors (24113888).

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

21414448 is a wasteful number, since it uses less digits than its factorization.

21414448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 727 counting only the distinct ones).

The product of its digits is 4096, while the sum is 28.

The square root of 21414448 is about 4627.5747427783. The cubic root of 21414448 is about 277.6955762220.

The spelling of 21414448 in words is "twenty-one million, four hundred fourteen thousand, four hundred forty-eight".