20555555454 has 48 divisors (see below), whose sum is σ = 52541399040. Its totient is φ = 5683562640.

The previous prime is 20555555431. The next prime is 20555555467. The reversal of 20555555454 is 45455555502.

20555555454 is a `hidden beast` number, since 2 + 0 + 5 + 55 + 55 + 545 + 4 = 666.

It is a super-2 number, since 2×20555555454² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2627374 + ... + 2635185.

It is an arithmetic number, because the mean of its divisors is an integer number (1094612480).

Almost surely, 2^20555555454 is an apocalyptic number.

20555555454 is an abundant number, since it is smaller than the sum of its proper divisors (31985843586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20555555454 is a wasteful number, since it uses less digits than its factorization.

20555555454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5262605 (or 5262602 counting only the distinct ones).

The product of its (nonzero) digits is 2500000, while the sum is 45.

The spelling of 20555555454 in words is "twenty billion, five hundred fifty-five million, five hundred fifty-five thousand, four hundred fifty-four".