20039935031 has 4 divisors (see below), whose sum is σ = 20043174000. Its totient is φ = 20036696064.

The previous prime is 20039935007. The next prime is 20039935073. The reversal of 20039935031 is 13053993002.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20039935031 is a prime.

It is a super-2 number, since 2×20039935031² (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 = 20039934982 and 20039935000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20039935931) 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, 1610186 + ... + 1622583.

It is an arithmetic number, because the mean of its divisors is an integer number (5010793500).

Almost surely, 2^20039935031 is an apocalyptic number.

20039935031 is a deficient number, since it is larger than the sum of its proper divisors (3238969).

20039935031 is an equidigital number, since it uses as much as digits as its factorization.

20039935031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3238968.

The product of its (nonzero) digits is 21870, while the sum is 35.

The spelling of 20039935031 in words is "twenty billion, thirty-nine million, nine hundred thirty-five thousand, thirty-one".