21182775118009 has 16 divisors (see below), whose sum is σ = 22954464130752. Its totient is φ = 19469654281728.

The previous prime is 21182775118007. The next prime is 21182775118033. The reversal of 21182775118009 is 90081157728112.

It is a cyclic number.

It is not a de Polignac number, because 21182775118009 - 2¹ = 21182775118007 is a prime.

It is a super-2 number, since 2×21182775118009² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21182775118007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1604757 + ... + 6703789.

It is an arithmetic number, because the mean of its divisors is an integer number (1434654008172).

Almost surely, 2^{21182775118009} is an apocalyptic number.

It is an amenable number.

21182775118009 is a deficient number, since it is larger than the sum of its proper divisors (1771689012743).

21182775118009 is a wasteful number, since it uses less digits than its factorization.

21182775118009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5104776.

The product of its (nonzero) digits is 564480, while the sum is 52.

The spelling of 21182775118009 in words is "twenty-one trillion, one hundred eighty-two billion, seven hundred seventy-five million, one hundred eighteen thousand, nine".