2031018493 has 6 divisors (see below), whose sum is σ = 2362613406. Its totient is φ = 1740872952.

The previous prime is 2031018481. The next prime is 2031018511. The reversal of 2031018493 is 3948101302.

It can be written as a sum of positive squares in only one way, i.e., 1457559684 + 573458809 = 38178^2 + 23947^2 .

It is not a de Polignac number, because 2031018493 - 2¹⁷ = 2030887421 is a prime.

It is a super-2 number, since 2×2031018493² = 8250072237815982098, which 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 (2031018463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20724630 + ... + 20724727.

It is an arithmetic number, because the mean of its divisors is an integer number (393768901).

Almost surely, 2^2031018493 is an apocalyptic number.

It is an amenable number.

2031018493 is a deficient number, since it is larger than the sum of its proper divisors (331594913).

2031018493 is an equidigital number, since it uses as much as digits as its factorization.

2031018493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41449371 (or 41449364 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 2031018493 is about 45066.8225305490. The cubic root of 2031018493 is about 1266.4011394100.

Adding to 2031018493 its reverse (3948101302), we get a palindrome (5979119795).

The spelling of 2031018493 in words is "two billion, thirty-one million, eighteen thousand, four hundred ninety-three".