2105451240 has 32 divisors (see below), whose sum is σ = 6316354080. Its totient is φ = 561453632.

The previous prime is 2105451223. The next prime is 2105451307. The reversal of 2105451240 is 421545012.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2105451240.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8772594 + ... + 8772833.

It is an arithmetic number, because the mean of its divisors is an integer number (197386065).

Almost surely, 2^2105451240 is an apocalyptic number.

2105451240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105451240 is an abundant number, since it is smaller than the sum of its proper divisors (4210902840).

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

2105451240 is a wasteful number, since it uses less digits than its factorization.

2105451240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17545441 (or 17545437 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 2105451240 is about 45885.1963055624. The cubic root of 2105451240 is about 1281.6862622559.

Adding to 2105451240 its reverse (421545012), we get a palindrome (2526996252).

The spelling of 2105451240 in words is "two billion, one hundred five million, four hundred fifty-one thousand, two hundred forty".