2105431660 has 24 divisors (see below), whose sum is σ = 4422610080. Its totient is φ = 841943424.

The previous prime is 2105431649. The next prime is 2105431663. The reversal of 2105431660 is 661345012.

It is a super-3 number, since 3×2105431660³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2105431663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74376 + ... + 98704.

It is an arithmetic number, because the mean of its divisors is an integer number (184275420).

Almost surely, 2^2105431660 is an apocalyptic number.

2105431660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105431660 is an abundant number, since it is smaller than the sum of its proper divisors (2317178420).

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

2105431660 is a wasteful number, since it uses less digits than its factorization.

2105431660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28665 (or 28663 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 2105431660 is about 45884.9829464935. The cubic root of 2105431660 is about 1281.6822891576.

Adding to 2105431660 its reverse (661345012), we get a palindrome (2766776672).

The spelling of 2105431660 in words is "two billion, one hundred five million, four hundred thirty-one thousand, six hundred sixty".