20047134 has 16 divisors (see below), whose sum is σ = 40659840. Its totient is φ = 6588120.

The previous prime is 20047133. The next prime is 20047151. The reversal of 20047134 is 43174002.

It is a super-2 number, since 2×20047134² = 803775163227912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20047134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20047133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23104 + ... + 23955.

It is an arithmetic number, because the mean of its divisors is an integer number (2541240).

Almost surely, 2^20047134 is an apocalyptic number.

20047134 is an abundant number, since it is smaller than the sum of its proper divisors (20612706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20047134 is a wasteful number, since it uses less digits than its factorization.

20047134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47135.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20047134 is about 4477.4025952554. The cubic root of 20047134 is about 271.6548299676.

The spelling of 20047134 in words is "twenty million, forty-seven thousand, one hundred thirty-four".