21468450 has 48 divisors (see below), whose sum is σ = 56380320. Its totient is φ = 5387520.

The previous prime is 21468449. The next prime is 21468463. The reversal of 21468450 is 5486412.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 1660 + ... + 6759.

It is an arithmetic number, because the mean of its divisors is an integer number (1174590).

Almost surely, 2^21468450 is an apocalyptic number.

21468450 is an abundant number, since it is smaller than the sum of its proper divisors (34911870).

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

21468450 is a wasteful number, since it uses less digits than its factorization.

21468450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8451 (or 8446 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 21468450 is about 4633.4058747319. The cubic root of 21468450 is about 277.9288070549.

The spelling of 21468450 in words is "twenty-one million, four hundred sixty-eight thousand, four hundred fifty".