20072731033 has 4 divisors (see below), whose sum is σ = 20104046388. Its totient is φ = 20041415680.

The previous prime is 20072731027. The next prime is 20072731061. The reversal of 20072731033 is 33013727002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33013727002 = 2 ⋅16506863501.

It can be written as a sum of positive squares in 2 ways, for example, as 8094960784 + 11977770249 = 89972^2 + 109443^2 .

It is a cyclic number.

It is not a de Polignac number, because 20072731033 - 2¹³ = 20072722841 is a prime.

It is a super-2 number, since 2×20072731033² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20072730992 and 20072731010.

It is not an unprimeable number, because it can be changed into a prime (20072731073) 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 3 ways as a sum of consecutive naturals, for example, 15656716 + ... + 15657997.

It is an arithmetic number, because the mean of its divisors is an integer number (5026011597).

Almost surely, 2^20072731033 is an apocalyptic number.

It is an amenable number.

20072731033 is a deficient number, since it is larger than the sum of its proper divisors (31315355).

20072731033 is an equidigital number, since it uses as much as digits as its factorization.

20072731033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31315354.

The product of its (nonzero) digits is 5292, while the sum is 28.

The spelling of 20072731033 in words is "twenty billion, seventy-two million, seven hundred thirty-one thousand, thirty-three".