20191901182 has 4 divisors (see below), whose sum is σ = 30287851776. Its totient is φ = 10095950590.

The previous prime is 20191901159. The next prime is 20191901221. The reversal of 20191901182 is 28110919102.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5047975294 + ... + 5047975297.

It is an arithmetic number, because the mean of its divisors is an integer number (7571962944).

Almost surely, 2^20191901182 is an apocalyptic number.

20191901182 is a deficient number, since it is larger than the sum of its proper divisors (10095950594).

20191901182 is a wasteful number, since it uses less digits than its factorization.

20191901182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10095950593.

The product of its (nonzero) digits is 2592, while the sum is 34.

The spelling of 20191901182 in words is "twenty billion, one hundred ninety-one million, nine hundred one thousand, one hundred eighty-two".