20535234455 has 8 divisors (see below), whose sum is σ = 24644230512. Its totient is φ = 16426888128.

The previous prime is 20535234451. The next prime is 20535234481. The reversal of 20535234455 is 55443253502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20535234455 - 2² = 20535234451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535234451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89957 + ... + 221726.

It is an arithmetic number, because the mean of its divisors is an integer number (3080528814).

Almost surely, 2^20535234455 is an apocalyptic number.

20535234455 is a deficient number, since it is larger than the sum of its proper divisors (4108996057).

20535234455 is a wasteful number, since it uses less digits than its factorization.

20535234455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324865.

The product of its (nonzero) digits is 360000, while the sum is 38.

Adding to 20535234455 its reverse (55443253502), we get a palindrome (75978487957).

The spelling of 20535234455 in words is "twenty billion, five hundred thirty-five million, two hundred thirty-four thousand, four hundred fifty-five".