21160650104505 has 12 divisors (see below), whose sum is σ = 36678460181220. Its totient is φ = 11285680055712.

The previous prime is 21160650104441. The next prime is 21160650104563. The reversal of 21160650104505 is 50540105606112.

21160650104505 is a `hidden beast` number, since 2 + 1 + 1 + 606 + 5 + 0 + 1 + 0 + 45 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15309166512249 + 5851483592256 = 3912693^2 + 2418984^2 .

It is not a de Polignac number, because 21160650104505 - 2⁶ = 21160650104441 is a prime.

It is a super-2 number, since 2×21160650104505² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21160650104505.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 235118334450 + ... + 235118334539.

It is an arithmetic number, because the mean of its divisors is an integer number (3056538348435).

Almost surely, 2^{21160650104505} is an apocalyptic number.

It is an amenable number.

21160650104505 is a deficient number, since it is larger than the sum of its proper divisors (15517810076715).

21160650104505 is a wasteful number, since it uses less digits than its factorization.

21160650104505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470236669000 (or 470236668997 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 21160650104505 in words is "twenty-one trillion, one hundred sixty billion, six hundred fifty million, one hundred four thousand, five hundred five".