18719492406 has 32 divisors (see below), whose sum is σ = 37772587008. Its totient is φ = 6184332000.

The previous prime is 18719492371. The next prime is 18719492411. The reversal of 18719492406 is 60429491781.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 759781 + ... + 784031.

It is an arithmetic number, because the mean of its divisors is an integer number (1180393344).

Almost surely, 2^18719492406 is an apocalyptic number.

18719492406 is an abundant number, since it is smaller than the sum of its proper divisors (19053094602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18719492406 is a wasteful number, since it uses less digits than its factorization.

18719492406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25396.

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 18719492406 in words is "eighteen billion, seven hundred nineteen million, four hundred ninety-two thousand, four hundred six".