20434534455 has 16 divisors (see below), whose sum is σ = 33578911584. Its totient is φ = 10603866240.

The previous prime is 20434534453. The next prime is 20434534489. The reversal of 20434534455 is 55443543402.

It is not a de Polignac number, because 20434534455 - 2¹ = 20434534453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434534453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18408936 + ... + 18410045.

It is an arithmetic number, because the mean of its divisors is an integer number (2098681974).

Almost surely, 2^20434534455 is an apocalyptic number.

20434534455 is a deficient number, since it is larger than the sum of its proper divisors (13144377129).

20434534455 is a wasteful number, since it uses less digits than its factorization.

20434534455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36819026.

The product of its (nonzero) digits is 576000, while the sum is 39.

The spelling of 20434534455 in words is "twenty billion, four hundred thirty-four million, five hundred thirty-four thousand, four hundred fifty-five".