20071181858 has 32 divisors (see below), whose sum is σ = 37143066240. Its totient is φ = 7921267200.

The previous prime is 20071181839. The next prime is 20071181891. The reversal of 20071181858 is 85818117002.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55343 + ... + 207858.

It is an arithmetic number, because the mean of its divisors is an integer number (1160720820).

Almost surely, 2^20071181858 is an apocalyptic number.

20071181858 is a deficient number, since it is larger than the sum of its proper divisors (17071884382).

20071181858 is a wasteful number, since it uses less digits than its factorization.

20071181858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263642.

The product of its (nonzero) digits is 35840, while the sum is 41.

The spelling of 20071181858 in words is "twenty billion, seventy-one million, one hundred eighty-one thousand, eight hundred fifty-eight".