21241418 has 8 divisors (see below), whose sum is σ = 34758720. Its totient is φ = 9655180.

The previous prime is 21241399. The next prime is 21241421. The reversal of 21241418 is 81414212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21241393 and 21241402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482738 + ... + 482781.

It is an arithmetic number, because the mean of its divisors is an integer number (4344840).

Almost surely, 2^21241418 is an apocalyptic number.

21241418 is a deficient number, since it is larger than the sum of its proper divisors (13517302).

21241418 is a wasteful number, since it uses less digits than its factorization.

21241418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965532.

The product of its digits is 512, while the sum is 23.

The square root of 21241418 is about 4608.8412860501. The cubic root of 21241418 is about 276.9456204859.

The spelling of 21241418 in words is "twenty-one million, two hundred forty-one thousand, four hundred eighteen".