20204955554 has 16 divisors (see below), whose sum is σ = 35481874176. Its totient is φ = 8448064800.

The previous prime is 20204955553. The next prime is 20204955587. The reversal of 20204955554 is 45555940202.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (20204955553) 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 7 ways as a sum of consecutive naturals, for example, 17599562 + ... + 17600709.

It is an arithmetic number, because the mean of its divisors is an integer number (2217617136).

Almost surely, 2^20204955554 is an apocalyptic number.

20204955554 is a deficient number, since it is larger than the sum of its proper divisors (15276918622).

20204955554 is a wasteful number, since it uses less digits than its factorization.

20204955554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35200321.

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 20204955554 in words is "twenty billion, two hundred four million, nine hundred fifty-five thousand, five hundred fifty-four".