10218405140 has 12 divisors (see below), whose sum is σ = 21458650836. Its totient is φ = 4087362048.

The previous prime is 10218405139. The next prime is 10218405161. The reversal of 10218405140 is 4150481201.

It can be written as a sum of positive squares in 2 ways, for example, as 2231050756 + 7987354384 = 47234^2 + 89372^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255460109 + ... + 255460148.

It is an arithmetic number, because the mean of its divisors is an integer number (1788220903).

Almost surely, 2^10218405140 is an apocalyptic number.

10218405140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10218405140 is an abundant number, since it is smaller than the sum of its proper divisors (11240245696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10218405140 is a wasteful number, since it uses less digits than its factorization.

10218405140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510920266 (or 510920264 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

Adding to 10218405140 its reverse (4150481201), we get a palindrome (14368886341).

The spelling of 10218405140 in words is "ten billion, two hundred eighteen million, four hundred five thousand, one hundred forty".