21450896 has 10 divisors (see below), whose sum is σ = 41561142. Its totient is φ = 10725440.

The previous prime is 21450887. The next prime is 21450899. The reversal of 21450896 is 69805412.

It can be written as a sum of positive squares in only one way, i.e., 17305600 + 4145296 = 4160^2 + 2036^2 .

It is not an unprimeable number, because it can be changed into a prime (21450899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670325 + ... + 670356.

Almost surely, 2^21450896 is an apocalyptic number.

It is an amenable number.

21450896 is a deficient number, since it is larger than the sum of its proper divisors (20110246).

21450896 is a wasteful number, since it uses less digits than its factorization.

21450896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340689 (or 1340683 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 21450896 is about 4631.5112004615. The cubic root of 21450896 is about 277.8530355139.

The spelling of 21450896 in words is "twenty-one million, four hundred fifty thousand, eight hundred ninety-six".