21338450 has 48 divisors (see below), whose sum is σ = 46497024. Its totient is φ = 7132800.

The previous prime is 21338441. The next prime is 21338467. The reversal of 21338450 is 5483312.

It is a Curzon number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 13607 + ... + 15093.

It is an arithmetic number, because the mean of its divisors is an integer number (968688).

Almost surely, 2^21338450 is an apocalyptic number.

21338450 is an abundant number, since it is smaller than the sum of its proper divisors (25158574).

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

21338450 is a wasteful number, since it uses less digits than its factorization.

21338450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547 (or 1542 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 21338450 is about 4619.3560157234. The cubic root of 21338450 is about 277.3666810835.

The spelling of 21338450 in words is "twenty-one million, three hundred thirty-eight thousand, four hundred fifty".