20475578954 has 4 divisors (see below), whose sum is σ = 30713368434. Its totient is φ = 10237789476.

The previous prime is 20475578941. The next prime is 20475579017. The reversal of 20475578954 is 45987557402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16275890929 + 4199688025 = 127577^2 + 64805^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20475578954.

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 as a sum of consecutive naturals, namely, 5118894737 + ... + 5118894740.

Almost surely, 2^20475578954 is an apocalyptic number.

20475578954 is a deficient number, since it is larger than the sum of its proper divisors (10237789480).

20475578954 is a wasteful number, since it uses less digits than its factorization.

20475578954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10237789479.

The product of its (nonzero) digits is 14112000, while the sum is 56.

The spelling of 20475578954 in words is "twenty billion, four hundred seventy-five million, five hundred seventy-eight thousand, nine hundred fifty-four".