18912894738 has 8 divisors (see below), whose sum is σ = 37825789488. Its totient is φ = 6304298244.

The previous prime is 18912894731. The next prime is 18912894787. The reversal of 18912894738 is 83749821981.

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

18912894738 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (18912894731) 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 3 ways as a sum of consecutive naturals, for example, 1576074556 + ... + 1576074567.

It is an arithmetic number, because the mean of its divisors is an integer number (4728223686).

Almost surely, 2^18912894738 is an apocalyptic number.

18912894738 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18912894738 is a wasteful number, since it uses less digits than its factorization.

18912894738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3152149128.

The product of its digits is 6967296, while the sum is 60.

The spelling of 18912894738 in words is "eighteen billion, nine hundred twelve million, eight hundred ninety-four thousand, seven hundred thirty-eight".