21741450 has 48 divisors (see below), whose sum is σ = 54270336. Its totient is φ = 5760000.

The previous prime is 21741449. The next prime is 21741451. The reversal of 21741450 is 5414712.

It is an interprime number because it is at equal distance from previous prime (21741449) and next prime (21741451).

It is a self number, because there is not a number n which added to its sum of digits gives 21741450.

It is not an unprimeable number, because it can be changed into a prime (21741451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28575 + ... + 29325.

It is an arithmetic number, because the mean of its divisors is an integer number (1130632).

Almost surely, 2^21741450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21741450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27135168).

21741450 is an abundant number, since it is smaller than the sum of its proper divisors (32528886).

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

21741450 is a wasteful number, since it uses less digits than its factorization.

21741450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959 (or 954 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 21741450 is about 4662.7727802242. The cubic root of 21741450 is about 279.1019270190.

The spelling of 21741450 in words is "twenty-one million, seven hundred forty-one thousand, four hundred fifty".