21241044 has 36 divisors (see below), whose sum is σ = 58574880. Its totient is φ = 6436560.

The previous prime is 21241043. The next prime is 21241049. The reversal of 21241044 is 44014212.

21241044 is a `hidden beast` number, since 212 + 410 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26424 + ... + 27215.

It is an arithmetic number, because the mean of its divisors is an integer number (1627080).

Almost surely, 2^21241044 is an apocalyptic number.

It is an amenable number.

21241044 is an abundant number, since it is smaller than the sum of its proper divisors (37333836).

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

21241044 is a wasteful number, since it uses less digits than its factorization.

21241044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53660 (or 53655 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 21241044 is about 4608.8007116819. The cubic root of 21241044 is about 276.9439950723.

Adding to 21241044 its reverse (44014212), we get a palindrome (65255256).

The spelling of 21241044 in words is "twenty-one million, two hundred forty-one thousand, forty-four".