18439481407 has 8 divisors (see below), whose sum is σ = 18928990080. Its totient is φ = 17952731160.

The previous prime is 18439481383. The next prime is 18439481413. The reversal of 18439481407 is 70418493481.

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

It is a cyclic number.

It is not a de Polignac number, because 18439481407 - 2¹⁵ = 18439448639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18439181407) 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, 676057 + ... + 702802.

It is an arithmetic number, because the mean of its divisors is an integer number (2366123760).

Almost surely, 2^18439481407 is an apocalyptic number.

18439481407 is a deficient number, since it is larger than the sum of its proper divisors (489508673).

18439481407 is a wasteful number, since it uses less digits than its factorization.

18439481407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379213.

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 18439481407 in words is "eighteen billion, four hundred thirty-nine million, four hundred eighty-one thousand, four hundred seven".