20534454555 has 32 divisors (see below), whose sum is σ = 33668550720. Its totient is φ = 10680760320.

The previous prime is 20534454553. The next prime is 20534454607. The reversal of 20534454555 is 55545443502.

It is not a de Polignac number, because 20534454555 - 2¹ = 20534454553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20534454553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2707749 + ... + 2715321.

It is an arithmetic number, because the mean of its divisors is an integer number (1052142210).

Almost surely, 2^20534454555 is an apocalyptic number.

20534454555 is a deficient number, since it is larger than the sum of its proper divisors (13134096165).

20534454555 is a wasteful number, since it uses less digits than its factorization.

20534454555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12031.

The product of its (nonzero) digits is 1200000, while the sum is 42.

The spelling of 20534454555 in words is "twenty billion, five hundred thirty-four million, four hundred fifty-four thousand, five hundred fifty-five".