20478611158 has 4 divisors (see below), whose sum is σ = 30717916740. Its totient is φ = 10239305578.

The previous prime is 20478611147. The next prime is 20478611159. The reversal of 20478611158 is 85111687402.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20478611159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5119652788 + ... + 5119652791.

It is an arithmetic number, because the mean of its divisors is an integer number (7679479185).

Almost surely, 2^20478611158 is an apocalyptic number.

20478611158 is a deficient number, since it is larger than the sum of its proper divisors (10239305582).

20478611158 is a wasteful number, since it uses less digits than its factorization.

20478611158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10239305581.

The product of its (nonzero) digits is 107520, while the sum is 43.

The spelling of 20478611158 in words is "twenty billion, four hundred seventy-eight million, six hundred eleven thousand, one hundred fifty-eight".