1820987510340 has 24 divisors (see below), whose sum is σ = 5098765029120. Its totient is φ = 485596669408.

The previous prime is 1820987510339. The next prime is 1820987510399. The reversal of 1820987510340 is 430157890281.

It is a self number, because there is not a number n which added to its sum of digits gives 1820987510340.

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, 15174895860 + ... + 15174895979.

It is an arithmetic number, because the mean of its divisors is an integer number (212448542880).

Almost surely, 2^{1820987510340} is an apocalyptic number.

1820987510340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1820987510340 is an abundant number, since it is smaller than the sum of its proper divisors (3277777518780).

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

1820987510340 is a wasteful number, since it uses less digits than its factorization.

1820987510340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30349791851 (or 30349791849 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 48.

The spelling of 1820987510340 in words is "one trillion, eight hundred twenty billion, nine hundred eighty-seven million, five hundred ten thousand, three hundred forty".