18939409466 has 16 divisors (see below), whose sum is σ = 28818929088. Its totient is φ = 9333189600.

The previous prime is 18939409459. The next prime is 18939409471. The reversal of 18939409466 is 66490493981.

18939409466 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434006 + ... + 475646.

It is an arithmetic number, because the mean of its divisors is an integer number (1801183068).

Almost surely, 2^18939409466 is an apocalyptic number.

18939409466 is a deficient number, since it is larger than the sum of its proper divisors (9879519622).

18939409466 is a wasteful number, since it uses less digits than its factorization.

18939409466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44917.

The product of its (nonzero) digits is 10077696, while the sum is 59.

The spelling of 18939409466 in words is "eighteen billion, nine hundred thirty-nine million, four hundred nine thousand, four hundred sixty-six".