1821475428052 has 24 divisors (see below), whose sum is σ = 3689064162560. Its totient is φ = 770750903520.

The previous prime is 1821475428023. The next prime is 1821475428133. The reversal of 1821475428052 is 2508245741281.

It is a junction number, because it is equal to n+sod(n) for n = 1821475427987 and 1821475428005.

It is a congruent number.

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, 411723699 + ... + 411728122.

Almost surely, 2^{1821475428052} is an apocalyptic number.

It is an amenable number.

1821475428052 is an abundant number, since it is smaller than the sum of its proper divisors (1867588734508).

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

1821475428052 is a wasteful number, since it uses less digits than its factorization.

1821475428052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823451911 (or 823451909 counting only the distinct ones).

The product of its (nonzero) digits is 1433600, while the sum is 49.

The spelling of 1821475428052 in words is "one trillion, eight hundred twenty-one billion, four hundred seventy-five million, four hundred twenty-eight thousand, fifty-two".