21163570011 has 24 divisors (see below), whose sum is σ = 32374021680. Its totient is φ = 13276555776.

The previous prime is 21163569929. The next prime is 21163570061. The reversal of 21163570011 is 11007536112.

21163570011 is a `hidden beast` number, since 2 + 11 + 635 + 7 + 0 + 0 + 11 = 666.

It is not a de Polignac number, because 21163570011 - 2¹⁵ = 21163537243 is a prime.

It is a super-2 number, since 2×21163570011² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21163570061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1081036 + ... + 1100438.

It is an arithmetic number, because the mean of its divisors is an integer number (1348917570).

Almost surely, 2^21163570011 is an apocalyptic number.

21163570011 is a deficient number, since it is larger than the sum of its proper divisors (11210451669).

21163570011 is a wasteful number, since it uses less digits than its factorization.

21163570011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26555 (or 26552 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The spelling of 21163570011 in words is "twenty-one billion, one hundred sixty-three million, five hundred seventy thousand, eleven".