2102340400040 has 32 divisors (see below), whose sum is σ = 4730317056000. Its totient is φ = 840927065664.

The previous prime is 2102340400019. The next prime is 2102340400129. The reversal of 2102340400040 is 400040432012.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2102340399985 and 2102340400021.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4423481 + ... + 4875639.

It is an arithmetic number, because the mean of its divisors is an integer number (147822408000).

Almost surely, 2^{2102340400040} is an apocalyptic number.

2102340400040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102340400040 is an abundant number, since it is smaller than the sum of its proper divisors (2627976655960).

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

2102340400040 is a wasteful number, since it uses less digits than its factorization.

2102340400040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568409 (or 568405 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 2102340400040 its reverse (400040432012), we get a palindrome (2502380832052).

The spelling of 2102340400040 in words is "two trillion, one hundred two billion, three hundred forty million, four hundred thousand, forty".