21093677 has 8 divisors (see below), whose sum is σ = 23355552. Its totient is φ = 18889200.

The previous prime is 21093661. The next prime is 21093689. The reversal of 21093677 is 77639012.

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

It is not a de Polignac number, because 21093677 - 2⁴ = 21093661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21093697) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 13574 + ... + 15047.

It is an arithmetic number, because the mean of its divisors is an integer number (2919444).

Almost surely, 2^21093677 is an apocalyptic number.

It is an amenable number.

21093677 is a deficient number, since it is larger than the sum of its proper divisors (2261875).

21093677 is a wasteful number, since it uses less digits than its factorization.

21093677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28699.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 21093677 is about 4592.7853204782. The cubic root of 21093677 is about 276.3020436607.

The spelling of 21093677 in words is "twenty-one million, ninety-three thousand, six hundred seventy-seven".