21483736 has 8 divisors (see below), whose sum is σ = 40282020. Its totient is φ = 10741864.

The previous prime is 21483731. The next prime is 21483743. The reversal of 21483736 is 63738412.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21483731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1342726 + ... + 1342741.

Almost surely, 2^21483736 is an apocalyptic number.

It is an amenable number.

21483736 is a deficient number, since it is larger than the sum of its proper divisors (18798284).

21483736 is a wasteful number, since it uses less digits than its factorization.

21483736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2685473 (or 2685469 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 21483736 is about 4635.0551237283. The cubic root of 21483736 is about 277.9947551760.

The spelling of 21483736 in words is "twenty-one million, four hundred eighty-three thousand, seven hundred thirty-six".