21063677 has 4 divisors (see below), whose sum is σ = 21074016. Its totient is φ = 21053340.

The previous prime is 21063673. The next prime is 21063689. The reversal of 21063677 is 77636012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21063677 - 2² = 21063673 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21063673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 983 + ... + 6564.

It is an arithmetic number, because the mean of its divisors is an integer number (5268504).

Almost surely, 2^21063677 is an apocalyptic number.

It is an amenable number.

21063677 is a deficient number, since it is larger than the sum of its proper divisors (10339).

21063677 is an equidigital number, since it uses as much as digits as its factorization.

21063677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10338.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 21063677 is about 4589.5181664310. The cubic root of 21063677 is about 276.1709934245.

Adding to 21063677 its reverse (77636012), we get a palindrome (98699689).

The spelling of 21063677 in words is "twenty-one million, sixty-three thousand, six hundred seventy-seven".