21441022 has 4 divisors (see below), whose sum is σ = 32161536. Its totient is φ = 10720510.

The previous prime is 21441011. The next prime is 21441031. The reversal of 21441022 is 22014412.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21440987 and 21441005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5360254 + ... + 5360257.

It is an arithmetic number, because the mean of its divisors is an integer number (8040384).

Almost surely, 2^21441022 is an apocalyptic number.

21441022 is a deficient number, since it is larger than the sum of its proper divisors (10720514).

21441022 is a wasteful number, since it uses less digits than its factorization.

21441022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10720513.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 21441022 is about 4630.4451189923. The cubic root of 21441022 is about 277.8103963947.

Adding to 21441022 its reverse (22014412), we get a palindrome (43455434).

The spelling of 21441022 in words is "twenty-one million, four hundred forty-one thousand, twenty-two".