1820360450138 has 8 divisors (see below), whose sum is σ = 2730600409332. Its totient is φ = 910160313696.

The previous prime is 1820360450137. The next prime is 1820360450141. The reversal of 1820360450138 is 8310540630281.

It can be written as a sum of positive squares in 2 ways, for example, as 1806048395449 + 14312054689 = 1343893^2 + 119633^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1820360450095 and 1820360450104.

It is not an unprimeable number, because it can be changed into a prime (1820360450131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9841145 + ... + 10024412.

Almost surely, 2^{1820360450138} is an apocalyptic number.

1820360450138 is a deficient number, since it is larger than the sum of its proper divisors (910239959194).

1820360450138 is a wasteful number, since it uses less digits than its factorization.

1820360450138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19911376.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 1820360450138 in words is "one trillion, eight hundred twenty billion, three hundred sixty million, four hundred fifty thousand, one hundred thirty-eight".