21476146 has 8 divisors (see below), whose sum is σ = 32285484. Its totient is φ = 10714320.

The previous prime is 21476131. The next prime is 21476159. The reversal of 21476146 is 64167412.

It can be written as a sum of positive squares in 2 ways, for example, as 18275625 + 3200521 = 4275^2 + 1789^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21476146² = 922449694026632, which contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 10725 + ... + 12568.

Almost surely, 2^21476146 is an apocalyptic number.

21476146 is a deficient number, since it is larger than the sum of its proper divisors (10809338).

21476146 is a wasteful number, since it uses less digits than its factorization.

21476146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23756.

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

The square root of 21476146 is about 4634.2362909114. The cubic root of 21476146 is about 277.9620136838.

The spelling of 21476146 in words is "twenty-one million, four hundred seventy-six thousand, one hundred forty-six".