21076927 has 4 divisors (see below), whose sum is σ = 21391576. Its totient is φ = 20762280.

The previous prime is 21076921. The next prime is 21076933. The reversal of 21076927 is 72967012.

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

It is an interprime number because it is at equal distance from previous prime (21076921) and next prime (21076933).

It is a cyclic number.

It is not a de Polignac number, because 21076927 - 2⁷ = 21076799 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21076892 and 21076901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21076921) 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, 157224 + ... + 157357.

It is an arithmetic number, because the mean of its divisors is an integer number (5347894).

Almost surely, 2^21076927 is an apocalyptic number.

21076927 is a deficient number, since it is larger than the sum of its proper divisors (314649).

21076927 is an equidigital number, since it uses as much as digits as its factorization.

21076927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314648.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 21076927 is about 4590.9614461461. The cubic root of 21076927 is about 276.2288892776.

The spelling of 21076927 in words is "twenty-one million, seventy-six thousand, nine hundred twenty-seven".