20031011393 has 2 divisors, whose sum is σ = 20031011394. Its totient is φ = 20031011392.

The previous prime is 20031011387. The next prime is 20031011477. The reversal of 20031011393 is 39311013002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14109401089 + 5921610304 = 118783^2 + 76952^2 .

It is a cyclic number.

It is not a de Polignac number, because 20031011393 - 2¹⁴ = 20030995009 is a prime.

It is not a weakly prime, because it can be changed into another prime (20031011323) 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 as a sum of consecutive naturals, namely, 10015505696 + 10015505697.

It is an arithmetic number, because the mean of its divisors is an integer number (10015505697).

Almost surely, 2^20031011393 is an apocalyptic number.

It is an amenable number.

20031011393 is a deficient number, since it is larger than the sum of its proper divisors (1).

20031011393 is an equidigital number, since it uses as much as digits as its factorization.

20031011393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 20031011393 its reverse (39311013002), we get a palindrome (59342024395).

The spelling of 20031011393 in words is "twenty billion, thirty-one million, eleven thousand, three hundred ninety-three".