21483646 has 4 divisors (see below), whose sum is σ = 32225472. Its totient is φ = 10741822.

The previous prime is 21483641. The next prime is 21483689. The reversal of 21483646 is 64638412.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21483641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5370910 + ... + 5370913.

It is an arithmetic number, because the mean of its divisors is an integer number (8056368).

Almost surely, 2^21483646 is an apocalyptic number.

21483646 is a deficient number, since it is larger than the sum of its proper divisors (10741826).

21483646 is a wasteful number, since it uses less digits than its factorization.

21483646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10741825.

The product of its digits is 27648, while the sum is 34.

The square root of 21483646 is about 4635.0454150957. The cubic root of 21483646 is about 277.9943669821.

The spelling of 21483646 in words is "twenty-one million, four hundred eighty-three thousand, six hundred forty-six".