21477327 has 8 divisors (see below), whose sum is σ = 29560320. Its totient is φ = 13856280.

The previous prime is 21477301. The next prime is 21477343. The reversal of 21477327 is 72377412.

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

It is not a de Polignac number, because 21477327 - 2⁶ = 21477263 is a prime.

It is a super-2 number, since 2×21477327² = 922551150129858, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21477227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115377 + ... + 115562.

It is an arithmetic number, because the mean of its divisors is an integer number (3695040).

Almost surely, 2^21477327 is an apocalyptic number.

21477327 is a deficient number, since it is larger than the sum of its proper divisors (8082993).

21477327 is a wasteful number, since it uses less digits than its factorization.

21477327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230973.

The product of its digits is 16464, while the sum is 33.

The square root of 21477327 is about 4634.3637103706. The cubic root of 21477327 is about 277.9671087495.

The spelling of 21477327 in words is "twenty-one million, four hundred seventy-seven thousand, three hundred twenty-seven".