21868522205 has 8 divisors (see below), whose sum is σ = 26611835904. Its totient is φ = 17248411600.

The previous prime is 21868522183. The next prime is 21868522211. The reversal of 21868522205 is 50222586812.

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

It is not a de Polignac number, because 21868522205 - 2¹⁴ = 21868505821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30800381 + ... + 30801090.

It is an arithmetic number, because the mean of its divisors is an integer number (3326479488).

Almost surely, 2^21868522205 is an apocalyptic number.

It is an amenable number.

21868522205 is a deficient number, since it is larger than the sum of its proper divisors (4743313699).

21868522205 is an equidigital number, since it uses as much as digits as its factorization.

21868522205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61601547.

The product of its (nonzero) digits is 153600, while the sum is 41.

The spelling of 21868522205 in words is "twenty-one billion, eight hundred sixty-eight million, five hundred twenty-two thousand, two hundred five".