20001837272831 has 4 divisors (see below), whose sum is σ = 20542427469432. Its totient is φ = 19461247076232.

The previous prime is 20001837272827. The next prime is 20001837272849. The reversal of 20001837272831 is 13827273810002.

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

It is a cyclic number.

It is not a de Polignac number, because 20001837272831 - 2² = 20001837272827 is a prime.

It is a super-2 number, since 2×20001837272831² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001837272891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270295098245 + ... + 270295098318.

It is an arithmetic number, because the mean of its divisors is an integer number (5135606867358).

Almost surely, 2^{20001837272831} is an apocalyptic number.

20001837272831 is a deficient number, since it is larger than the sum of its proper divisors (540590196601).

20001837272831 is an equidigital number, since it uses as much as digits as its factorization.

20001837272831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540590196600.

The product of its (nonzero) digits is 225792, while the sum is 44.

The spelling of 20001837272831 in words is "twenty trillion, one billion, eight hundred thirty-seven million, two hundred seventy-two thousand, eight hundred thirty-one".