21441046 has 16 divisors (see below), whose sum is σ = 37149840. Its totient is φ = 9172480.

The previous prime is 21441031. The next prime is 21441089. The reversal of 21441046 is 64014412.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 28291 + ... + 29038.

It is an arithmetic number, because the mean of its divisors is an integer number (2321865).

Almost surely, 2^21441046 is an apocalyptic number.

21441046 is a deficient number, since it is larger than the sum of its proper divisors (15708794).

21441046 is a wasteful number, since it uses less digits than its factorization.

21441046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57359.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 21441046 is about 4630.4477105351. The cubic root of 21441046 is about 277.8105000503.

Adding to 21441046 its reverse (64014412), we get a palindrome (85455458).

The spelling of 21441046 in words is "twenty-one million, four hundred forty-one thousand, forty-six".