1821475428051 has 16 divisors (see below), whose sum is σ = 2580282064800. Its totient is φ = 1140756277248.

The previous prime is 1821475428023. The next prime is 1821475428133. The reversal of 1821475428051 is 1508245741281.

It is not a de Polignac number, because 1821475428051 - 2⁷ = 1821475427923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1821475428551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282922446 + ... + 282928883.

It is an arithmetic number, because the mean of its divisors is an integer number (161267629050).

Almost surely, 2^{1821475428051} is an apocalyptic number.

1821475428051 is a deficient number, since it is larger than the sum of its proper divisors (758806636749).

1821475428051 is a wasteful number, since it uses less digits than its factorization.

1821475428051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565851398.

The product of its (nonzero) digits is 716800, while the sum is 48.

The spelling of 1821475428051 in words is "one trillion, eight hundred twenty-one billion, four hundred seventy-five million, four hundred twenty-eight thousand, fifty-one".