2005194147 has 16 divisors (see below), whose sum is σ = 2925316992. Its totient is φ = 1211656320.

The previous prime is 2005194143. The next prime is 2005194161. The reversal of 2005194147 is 7414915002.

It is a happy number.

It is not a de Polignac number, because 2005194147 - 2² = 2005194143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (2005194143) by changing a digit.

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, 79033 + ... + 101274.

It is an arithmetic number, because the mean of its divisors is an integer number (182832312).

Almost surely, 2^2005194147 is an apocalyptic number.

2005194147 is a deficient number, since it is larger than the sum of its proper divisors (920122845).

2005194147 is a wasteful number, since it uses less digits than its factorization.

2005194147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180658.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 2005194147 is about 44779.3942232362. The cubic root of 2005194147 is about 1261.0108095669.

The spelling of 2005194147 in words is "two billion, five million, one hundred ninety-four thousand, one hundred forty-seven".