16854120839 has 2 divisors, whose sum is σ = 16854120840. Its totient is φ = 16854120838.

The previous prime is 16854120809. The next prime is 16854120853. The reversal of 16854120839 is 93802145861.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16854120839 is a prime.

It is a super-2 number, since 2×16854120839² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16854120793 and 16854120802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16854120809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8427060419 + 8427060420.

It is an arithmetic number, because the mean of its divisors is an integer number (8427060420).

Almost surely, 2^16854120839 is an apocalyptic number.

16854120839 is a deficient number, since it is larger than the sum of its proper divisors (1).

16854120839 is an equidigital number, since it uses as much as digits as its factorization.

16854120839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 16854120839 in words is "sixteen billion, eight hundred fifty-four million, one hundred twenty thousand, eight hundred thirty-nine".