21160572205 has 8 divisors (see below), whose sum is σ = 25393483872. Its totient is φ = 16927926288.

The previous prime is 21160572157. The next prime is 21160572241. The reversal of 21160572205 is 50227506112.

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 21160572205 - 2⁷ = 21160572077 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, 224862 + ... + 304768.

It is an arithmetic number, because the mean of its divisors is an integer number (3174185484).

Almost surely, 2^21160572205 is an apocalyptic number.

It is an amenable number.

21160572205 is a deficient number, since it is larger than the sum of its proper divisors (4232911667).

21160572205 is an equidigital number, since it uses as much as digits as its factorization.

21160572205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132875.

The product of its (nonzero) digits is 8400, while the sum is 31.

The spelling of 21160572205 in words is "twenty-one billion, one hundred sixty million, five hundred seventy-two thousand, two hundred five".