16838725381 has 4 divisors (see below), whose sum is σ = 16842416992. Its totient is φ = 16835033772.

The previous prime is 16838725373. The next prime is 16838725427. The reversal of 16838725381 is 18352783861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16838725381 - 2³ = 16838725373 is a prime.

It is a super-2 number, since 2×16838725381² (a number of 21 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 (16838725331) 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 3 ways as a sum of consecutive naturals, for example, 1838955 + ... + 1848088.

It is an arithmetic number, because the mean of its divisors is an integer number (4210604248).

Almost surely, 2^16838725381 is an apocalyptic number.

It is an amenable number.

16838725381 is a deficient number, since it is larger than the sum of its proper divisors (3691611).

16838725381 is an equidigital number, since it uses as much as digits as its factorization.

16838725381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3691610.

The product of its digits is 1935360, while the sum is 52.

The spelling of 16838725381 in words is "sixteen billion, eight hundred thirty-eight million, seven hundred twenty-five thousand, three hundred eighty-one".