21854322 has 48 divisors (see below), whose sum is σ = 54654912. Its totient is φ = 6181920.

The previous prime is 21854317. The next prime is 21854341. The reversal of 21854322 is 22345812.

It is a super-2 number, since 2×21854322² = 955222780159368, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12672 + ... + 14292.

It is an arithmetic number, because the mean of its divisors is an integer number (1138644).

Almost surely, 2^21854322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21854322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27327456).

21854322 is an abundant number, since it is smaller than the sum of its proper divisors (32800590).

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

21854322 is a wasteful number, since it uses less digits than its factorization.

21854322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743 (or 1740 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 21854322 is about 4674.8606396341. The cubic root of 21854322 is about 279.5840848819.

The spelling of 21854322 in words is "twenty-one million, eight hundred fifty-four thousand, three hundred twenty-two".