21732965369 has 16 divisors (see below), whose sum is σ = 22724444160. Its totient is φ = 20761338000.

The previous prime is 21732965363. The next prime is 21732965383. The reversal of 21732965369 is 96356923712.

It is a cyclic number.

It is not a de Polignac number, because 21732965369 - 2¹⁶ = 21732899833 is a prime.

It is a super-2 number, since 2×21732965369² (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 21732965369.

It is not an unprimeable number, because it can be changed into a prime (21732965363) 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, 761642 + ... + 789660.

It is an arithmetic number, because the mean of its divisors is an integer number (1420277760).

Almost surely, 2^21732965369 is an apocalyptic number.

It is an amenable number.

21732965369 is a deficient number, since it is larger than the sum of its proper divisors (991478791).

21732965369 is a wasteful number, since it uses less digits than its factorization.

21732965369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28372.

The product of its digits is 3674160, while the sum is 53.

The spelling of 21732965369 in words is "twenty-one billion, seven hundred thirty-two million, nine hundred sixty-five thousand, three hundred sixty-nine".