1853836921869 has 8 divisors (see below), whose sum is σ = 2472025101312. Its totient is φ = 1235770011840.

The previous prime is 1853836921829. The next prime is 1853836921873. The reversal of 1853836921869 is 9681296383581.

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

It is not a de Polignac number, because 1853836921869 - 2¹⁷ = 1853836790797 is a prime.

It is a super-2 number, since 2×1853836921869² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1853836921829) 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 7 ways as a sum of consecutive naturals, for example, 30281677 + ... + 30342834.

It is an arithmetic number, because the mean of its divisors is an integer number (309003137664).

Almost surely, 2^{1853836921869} is an apocalyptic number.

It is an amenable number.

1853836921869 is a deficient number, since it is larger than the sum of its proper divisors (618188179443).

1853836921869 is a wasteful number, since it uses less digits than its factorization.

1853836921869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60634707.

The product of its digits is 134369280, while the sum is 69.

The spelling of 1853836921869 in words is "one trillion, eight hundred fifty-three billion, eight hundred thirty-six million, nine hundred twenty-one thousand, eight hundred sixty-nine".