18969386394 has 32 divisors (see below), whose sum is σ = 43527332736. Its totient is φ = 5398732800.

The previous prime is 18969386363. The next prime is 18969386453. The reversal of 18969386394 is 49368396981.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 867907 + ... + 889494.

It is an arithmetic number, because the mean of its divisors is an integer number (1360229148).

Almost surely, 2^18969386394 is an apocalyptic number.

18969386394 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18969386394 is an abundant number, since it is smaller than the sum of its proper divisors (24557946342).

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

18969386394 is a wasteful number, since it uses less digits than its factorization.

18969386394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757670.

The product of its digits is 60466176, while the sum is 66.

The spelling of 18969386394 in words is "eighteen billion, nine hundred sixty-nine million, three hundred eighty-six thousand, three hundred ninety-four".