21466044 has 18 divisors (see below), whose sum is σ = 54261480. Its totient is φ = 7155336.

The previous prime is 21466037. The next prime is 21466079. The reversal of 21466044 is 44066412.

It is a tau number, because it is divible by the number of its divisors (18).

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 21465999 and 21466017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 298104 + ... + 298175.

Almost surely, 2^21466044 is an apocalyptic number.

It is an amenable number.

21466044 is an abundant number, since it is smaller than the sum of its proper divisors (32795436).

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

21466044 is a wasteful number, since it uses less digits than its factorization.

21466044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596289 (or 596284 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 21466044 is about 4633.1462312342. The cubic root of 21466044 is about 277.9184240402.

The spelling of 21466044 in words is "twenty-one million, four hundred sixty-six thousand, forty-four".