2102451015340 has 48 divisors (see below), whose sum is σ = 4800936748608. Its totient is φ = 768752803584.

The previous prime is 2102451015331. The next prime is 2102451015359. The reversal of 2102451015340 is 435101542012.

It is a junction number, because it is equal to n+sod(n) for n = 2102451015299 and 2102451015308.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39227347 + ... + 39280906.

It is an arithmetic number, because the mean of its divisors is an integer number (100019515596).

Almost surely, 2^{2102451015340} is an apocalyptic number.

2102451015340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102451015340 is an abundant number, since it is smaller than the sum of its proper divisors (2698485733268).

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

2102451015340 is a wasteful number, since it uses less digits than its factorization.

2102451015340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78508378 (or 78508376 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 2102451015340 its reverse (435101542012), we get a palindrome (2537552557352).

The spelling of 2102451015340 in words is "two trillion, one hundred two billion, four hundred fifty-one million, fifteen thousand, three hundred forty".