1820100010000 has 100 divisors (see below), whose sum is σ = 4429481184172. Its totient is φ = 724267008000.

The previous prime is 1820100009979. The next prime is 1820100010033. The reversal of 1820100010000 is 100010281.

It can be written as a sum of positive squares in 10 ways, for example, as 1077311140096 + 742788869904 = 1037936^2 + 861852^2 .

It is a tau number, because it is divible by the number of its divisors (100).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1458472 + ... + 2401528.

Almost surely, 2^{1820100010000} is an apocalyptic number.

1820100010000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1820100010000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2214740592086).

1820100010000 is an abundant number, since it is smaller than the sum of its proper divisors (2609381174172).

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

1820100010000 is an equidigital number, since it uses as much as digits as its factorization.

1820100010000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943278 (or 943257 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1820100010000 its reverse (100010281), we get a palindrome (1820200020281).

The spelling of 1820100010000 in words is "one trillion, eight hundred twenty billion, one hundred million, ten thousand".