21142518336069 has 16 divisors (see below), whose sum is σ = 31956303019200. Its totient is φ = 12326002592256.

The previous prime is 21142518336047. The next prime is 21142518336083. The reversal of 21142518336069 is 96063381524112.

It is a de Polignac number, because none of the positive numbers 2^k-21142518336069 is a prime.

It is a super-2 number, since 2×21142518336069² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142518336769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14266205964 + ... + 14266207445.

It is an arithmetic number, because the mean of its divisors is an integer number (1997268938700).

Almost surely, 2^{21142518336069} is an apocalyptic number.

It is an amenable number.

21142518336069 is a deficient number, since it is larger than the sum of its proper divisors (10813784683131).

21142518336069 is a wasteful number, since it uses less digits than its factorization.

21142518336069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28532413444.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 21142518336069 in words is "twenty-one trillion, one hundred forty-two billion, five hundred eighteen million, three hundred thirty-six thousand, sixty-nine".