1820828919141 has 6 divisors (see below), whose sum is σ = 2630086216550. Its totient is φ = 1213885946088.

The previous prime is 1820828919139. The next prime is 1820828919167. The reversal of 1820828919141 is 1419198280281.

1820828919141 is a `hidden beast` number, since 1 + 8 + 208 + 289 + 19 + 141 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1757599805025 + 63229114116 = 1325745^2 + 251454^2 .

It is not a de Polignac number, because 1820828919141 - 2¹ = 1820828919139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820828919101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101157162166 + ... + 101157162183.

Almost surely, 2^{1820828919141} is an apocalyptic number.

It is an amenable number.

1820828919141 is a deficient number, since it is larger than the sum of its proper divisors (809257297409).

1820828919141 is a wasteful number, since it uses less digits than its factorization.

1820828919141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202314324355 (or 202314324352 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 54.

The spelling of 1820828919141 in words is "one trillion, eight hundred twenty billion, eight hundred twenty-eight million, nine hundred nineteen thousand, one hundred forty-one".