21411044 has 12 divisors (see below), whose sum is σ = 37997568. Its totient is φ = 10554600.

The previous prime is 21411023. The next prime is 21411059. The reversal of 21411044 is 44011412.

It is a congruent number.

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, 37412 + ... + 37979.

It is an arithmetic number, because the mean of its divisors is an integer number (3166464).

Almost surely, 2^21411044 is an apocalyptic number.

It is an amenable number.

21411044 is a deficient number, since it is larger than the sum of its proper divisors (16586524).

21411044 is a wasteful number, since it uses less digits than its factorization.

21411044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75466 (or 75464 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 21411044 is about 4627.2069329132. The cubic root of 21411044 is about 277.6808614551.

Adding to 21411044 its reverse (44011412), we get a palindrome (65422456).

The spelling of 21411044 in words is "twenty-one million, four hundred eleven thousand, forty-four".