20047837281 has 8 divisors (see below), whose sum is σ = 27382412064. Its totient is φ = 13039243680.

The previous prime is 20047837279. The next prime is 20047837283. The reversal of 20047837281 is 18273874002.

It is an interprime number because it is at equal distance from previous prime (20047837279) and next prime (20047837283).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20047837281 - 2¹ = 20047837279 is a prime.

It is a super-2 number, since 2×20047837281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20047837283) 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 7 ways as a sum of consecutive naturals, for example, 81495151 + ... + 81495396.

It is an arithmetic number, because the mean of its divisors is an integer number (3422801508).

Almost surely, 2^20047837281 is an apocalyptic number.

It is an amenable number.

20047837281 is a deficient number, since it is larger than the sum of its proper divisors (7334574783).

20047837281 is a wasteful number, since it uses less digits than its factorization.

20047837281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162990591.

The product of its (nonzero) digits is 150528, while the sum is 42.

The spelling of 20047837281 in words is "twenty billion, forty-seven million, eight hundred thirty-seven thousand, two hundred eighty-one".