18434120377407 has 8 divisors (see below), whose sum is σ = 28090088194176. Its totient is φ = 10533783072792.

The previous prime is 18434120377381. The next prime is 18434120377471. The reversal of 18434120377407 is 70477302143481.

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

It is not a de Polignac number, because 18434120377407 - 2⁷ = 18434120377279 is a prime.

It is a super-2 number, since 2×18434120377407² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18434120377407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18434120377307) 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, 438907628013 + ... + 438907628054.

It is an arithmetic number, because the mean of its divisors is an integer number (3511261024272).

Almost surely, 2^{18434120377407} is an apocalyptic number.

18434120377407 is a deficient number, since it is larger than the sum of its proper divisors (9655967816769).

18434120377407 is an equidigital number, since it uses as much as digits as its factorization.

18434120377407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877815256077.

The product of its (nonzero) digits is 3161088, while the sum is 51.

The spelling of 18434120377407 in words is "eighteen trillion, four hundred thirty-four billion, one hundred twenty million, three hundred seventy-seven thousand, four hundred seven".