20105603158 has 16 divisors (see below), whose sum is σ = 30419940096. Its totient is φ = 9965983360.

The previous prime is 20105603149. The next prime is 20105603173. The reversal of 20105603158 is 85130650102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22110 + ... + 201742.

It is an arithmetic number, because the mean of its divisors is an integer number (1901246256).

Almost surely, 2^20105603158 is an apocalyptic number.

20105603158 is a deficient number, since it is larger than the sum of its proper divisors (10314336938).

20105603158 is a wasteful number, since it uses less digits than its factorization.

20105603158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180119.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 20105603158 in words is "twenty billion, one hundred five million, six hundred three thousand, one hundred fifty-eight".