18399435351 has 8 divisors (see below), whose sum is σ = 26762815104. Its totient is φ = 11151172920.

The previous prime is 18399435349. The next prime is 18399435361. The reversal of 18399435351 is 15353499381.

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

It is not a de Polignac number, because 18399435351 - 2¹ = 18399435349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18399435294 and 18399435303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18399435361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278779291 + ... + 278779356.

It is an arithmetic number, because the mean of its divisors is an integer number (3345351888).

Almost surely, 2^18399435351 is an apocalyptic number.

18399435351 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18399435351 is a deficient number, since it is larger than the sum of its proper divisors (8363379753).

18399435351 is a wasteful number, since it uses less digits than its factorization.

18399435351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557558661.

The product of its digits is 1749600, while the sum is 51.

The spelling of 18399435351 in words is "eighteen billion, three hundred ninety-nine million, four hundred thirty-five thousand, three hundred fifty-one".