21310795187 has 8 divisors (see below), whose sum is σ = 23255631360. Its totient is φ = 19367207560.

The previous prime is 21310795183. The next prime is 21310795267. The reversal of 21310795187 is 78159701312.

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 21310795187 - 2² = 21310795183 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21310795183) 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, 276263 + ... + 344880.

It is an arithmetic number, because the mean of its divisors is an integer number (2906953920).

Almost surely, 2^21310795187 is an apocalyptic number.

21310795187 is a deficient number, since it is larger than the sum of its proper divisors (1944836173).

21310795187 is a wasteful number, since it uses less digits than its factorization.

21310795187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624273.

The product of its (nonzero) digits is 105840, while the sum is 44.

The spelling of 21310795187 in words is "twenty-one billion, three hundred ten million, seven hundred ninety-five thousand, one hundred eighty-seven".