21732815384553 has 24 divisors (see below), whose sum is σ = 35860063937088. Its totient is φ = 11463463058112.

The previous prime is 21732815384543. The next prime is 21732815384587. The reversal of 21732815384553 is 35548351823712.

It is not a de Polignac number, because 21732815384553 - 2²⁸ = 21732546949097 is a prime.

It is a super-2 number, since 2×21732815384553² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21732815384493 and 21732815384502.

It is not an unprimeable number, because it can be changed into a prime (21732815384543) 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, 3061818850 + ... + 3061825947.

It is an arithmetic number, because the mean of its divisors is an integer number (1494169330712).

Almost surely, 2^{21732815384553} is an apocalyptic number.

It is an amenable number.

21732815384553 is a deficient number, since it is larger than the sum of its proper divisors (14127248552535).

21732815384553 is a wasteful number, since it uses less digits than its factorization.

21732815384553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6123644833 (or 6123644820 counting only the distinct ones).

The product of its digits is 24192000, while the sum is 57.

The spelling of 21732815384553 in words is "twenty-one trillion, seven hundred thirty-two billion, eight hundred fifteen million, three hundred eighty-four thousand, five hundred fifty-three".