1872845192021 has 16 divisors (see below), whose sum is σ = 1996275801600. Its totient is φ = 1752930926208.

The previous prime is 1872845191979. The next prime is 1872845192069. The reversal of 1872845192021 is 1202915482781.

It is not a de Polignac number, because 1872845192021 - 2²⁶ = 1872778083157 is a prime.

It is a super-2 number, since 2×1872845192021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1872845192221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4996025 + ... + 5357793.

It is an arithmetic number, because the mean of its divisors is an integer number (124767237600).

Almost surely, 2^{1872845192021} is an apocalyptic number.

It is an amenable number.

1872845192021 is a deficient number, since it is larger than the sum of its proper divisors (123430609579).

1872845192021 is a wasteful number, since it uses less digits than its factorization.

1872845192021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366628.

The product of its (nonzero) digits is 645120, while the sum is 50.

The spelling of 1872845192021 in words is "one trillion, eight hundred seventy-two billion, eight hundred forty-five million, one hundred ninety-two thousand, twenty-one".