20475318554 has 8 divisors (see below), whose sum is σ = 30718389780. Its totient is φ = 10235855296.

The previous prime is 20475318553. The next prime is 20475318559. The reversal of 20475318554 is 45581357402.

It can be written as a sum of positive squares in 2 ways, for example, as 16918985329 + 3556333225 = 130073^2 + 59635^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20475318553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887759 + ... + 910530.

Almost surely, 2^20475318554 is an apocalyptic number.

20475318554 is a deficient number, since it is larger than the sum of its proper divisors (10243071226).

20475318554 is a wasteful number, since it uses less digits than its factorization.

20475318554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1803984.

The product of its (nonzero) digits is 672000, while the sum is 44.

The spelling of 20475318554 in words is "twenty billion, four hundred seventy-five million, three hundred eighteen thousand, five hundred fifty-four".