84018400443 has 10 divisors (see below), whose sum is σ = 125508968684. Its totient is φ = 56012266908.

The previous prime is 84018400429. The next prime is 84018400493. The reversal of 84018400443 is 34400481048.

It is not a de Polignac number, because 84018400443 - 2¹⁷ = 84018269371 is a prime.

It is a super-2 number, since 2×84018400443² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84018400398 and 84018400407.

It is not an unprimeable number, because it can be changed into a prime (84018400493) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 518632021 + ... + 518632182.

Almost surely, 2^84018400443 is an apocalyptic number.

84018400443 is a deficient number, since it is larger than the sum of its proper divisors (41490568241).

84018400443 is a wasteful number, since it uses less digits than its factorization.

84018400443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037264215 (or 1037264206 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 36.

The spelling of 84018400443 in words is "eighty-four billion, eighteen million, four hundred thousand, four hundred forty-three".