21336546869 has 16 divisors (see below), whose sum is σ = 24512258880. Its totient is φ = 18367752960.

The previous prime is 21336546863. The next prime is 21336546883. The reversal of 21336546869 is 96864563312.

It is not a de Polignac number, because 21336546869 - 2⁴ = 21336546853 is a prime.

It is a super-2 number, since 2×21336546869² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21336546869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21336546863) 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, 470957 + ... + 514269.

It is an arithmetic number, because the mean of its divisors is an integer number (1532016180).

Almost surely, 2^21336546869 is an apocalyptic number.

It is an amenable number.

21336546869 is a deficient number, since it is larger than the sum of its proper divisors (3175712011).

21336546869 is a wasteful number, since it uses less digits than its factorization.

21336546869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45700.

The product of its digits is 5598720, while the sum is 53.

The spelling of 21336546869 in words is "twenty-one billion, three hundred thirty-six million, five hundred forty-six thousand, eight hundred sixty-nine".