20205478954 has 8 divisors (see below), whose sum is σ = 30309676128. Its totient is φ = 10102253580.

The previous prime is 20205478949. The next prime is 20205478963. The reversal of 20205478954 is 45987450202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20205478954² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188532 + ... + 275599.

It is an arithmetic number, because the mean of its divisors is an integer number (3788709516).

Almost surely, 2^20205478954 is an apocalyptic number.

20205478954 is a deficient number, since it is larger than the sum of its proper divisors (10104197174).

20205478954 is a wasteful number, since it uses less digits than its factorization.

20205478954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485900.

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 20205478954 in words is "twenty billion, two hundred five million, four hundred seventy-eight thousand, nine hundred fifty-four".