21483706 has 4 divisors (see below), whose sum is σ = 32225562. Its totient is φ = 10741852.

The previous prime is 21483697. The next prime is 21483719. The reversal of 21483706 is 60738412.

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

It can be written as a sum of positive squares in only one way, i.e., 19053225 + 2430481 = 4365^2 + 1559^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5370925 + ... + 5370928.

Almost surely, 2^21483706 is an apocalyptic number.

21483706 is a deficient number, since it is larger than the sum of its proper divisors (10741856).

21483706 is a wasteful number, since it uses less digits than its factorization.

21483706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10741855.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 21483706 is about 4635.0518875197. The cubic root of 21483706 is about 277.9946257781.

The spelling of 21483706 in words is "twenty-one million, four hundred eighty-three thousand, seven hundred six".