20352135531543 has 16 divisors (see below), whose sum is σ = 27201369501696. Its totient is φ = 13535497694880.

The previous prime is 20352135531529. The next prime is 20352135531571. The reversal of 20352135531543 is 34513553125302.

It is not a de Polignac number, because 20352135531543 - 2¹⁶ = 20352135466007 is a prime.

It is a super-2 number, since 2×20352135531543² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20352135531495 and 20352135531504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20352135531583) 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, 51615646 + ... + 52008452.

It is an arithmetic number, because the mean of its divisors is an integer number (1700085593856).

Almost surely, 2^{20352135531543} is an apocalyptic number.

20352135531543 is a deficient number, since it is larger than the sum of its proper divisors (6849233970153).

20352135531543 is a wasteful number, since it uses less digits than its factorization.

20352135531543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434254.

The product of its (nonzero) digits is 810000, while the sum is 42.

Adding to 20352135531543 its reverse (34513553125302), we get a palindrome (54865688656845).

The spelling of 20352135531543 in words is "twenty trillion, three hundred fifty-two billion, one hundred thirty-five million, five hundred thirty-one thousand, five hundred forty-three".