21087662093 has 8 divisors (see below), whose sum is σ = 21116287488. Its totient is φ = 21059058384.

The previous prime is 21087662077. The next prime is 21087662131. The reversal of 21087662093 is 39026678012.

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

It is a cyclic number.

It is not a de Polignac number, because 21087662093 - 2⁴ = 21087662077 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 (21087662003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2872055 + ... + 2879387.

It is an arithmetic number, because the mean of its divisors is an integer number (2639535936).

Almost surely, 2^21087662093 is an apocalyptic number.

It is an amenable number.

21087662093 is a deficient number, since it is larger than the sum of its proper divisors (28625395).

21087662093 is a wasteful number, since it uses less digits than its factorization.

21087662093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10843.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 21087662093 in words is "twenty-one billion, eighty-seven million, six hundred sixty-two thousand, ninety-three".