20284491238 has 16 divisors (see below), whose sum is σ = 34939794240. Its totient is φ = 8734948200.

The previous prime is 20284491221. The next prime is 20284491259. The reversal of 20284491238 is 83219448202.

It is a happy number.

It is a super-2 number, since 2×20284491238² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20284491194 and 20284491203.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 24263328 + ... + 24264163.

It is an arithmetic number, because the mean of its divisors is an integer number (2183737140).

Almost surely, 2^20284491238 is an apocalyptic number.

20284491238 is a deficient number, since it is larger than the sum of its proper divisors (14655303002).

20284491238 is a wasteful number, since it uses less digits than its factorization.

20284491238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48527523.

The product of its (nonzero) digits is 221184, while the sum is 43.

The spelling of 20284491238 in words is "twenty billion, two hundred eighty-four million, four hundred ninety-one thousand, two hundred thirty-eight".