21350044 has 12 divisors (see below), whose sum is σ = 37405984. Its totient is φ = 10662624.

The previous prime is 21350039. The next prime is 21350071. The reversal of 21350044 is 44005312.

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, 1549 + ... + 6715.

Almost surely, 2^21350044 is an apocalyptic number.

It is an amenable number.

21350044 is a deficient number, since it is larger than the sum of its proper divisors (16055940).

21350044 is a wasteful number, since it uses less digits than its factorization.

21350044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6204 (or 6202 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 21350044 is about 4620.6107821369. The cubic root of 21350044 is about 277.4169066475.

Adding to 21350044 its reverse (44005312), we get a palindrome (65355356).

The spelling of 21350044 in words is "twenty-one million, three hundred fifty thousand, forty-four".