20205047554 has 16 divisors (see below), whose sum is σ = 30530073600. Its totient is φ = 10028441520.

The previous prime is 20205047501. The next prime is 20205047573. The reversal of 20205047554 is 45574050202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475189 + ... + 515959.

It is an arithmetic number, because the mean of its divisors is an integer number (1908129600).

Almost surely, 2^20205047554 is an apocalyptic number.

20205047554 is a deficient number, since it is larger than the sum of its proper divisors (10325026046).

20205047554 is a wasteful number, since it uses less digits than its factorization.

20205047554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42585.

The product of its (nonzero) digits is 56000, while the sum is 34.

Adding to 20205047554 its reverse (45574050202), we get a palindrome (65779097756).

The spelling of 20205047554 in words is "twenty billion, two hundred five million, forty-seven thousand, five hundred fifty-four".