18914191554 has 64 divisors (see below), whose sum is σ = 40536869760. Its totient is φ = 5865592320.

The previous prime is 18914191553. The next prime is 18914191559. The reversal of 18914191554 is 45519141981.

It is not an unprimeable number, because it can be changed into a prime (18914191553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5262382 + ... + 5265974.

It is an arithmetic number, because the mean of its divisors is an integer number (633388590).

Almost surely, 2^18914191554 is an apocalyptic number.

18914191554 is an abundant number, since it is smaller than the sum of its proper divisors (21622678206).

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

18914191554 is a wasteful number, since it uses less digits than its factorization.

18914191554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4435.

The product of its digits is 259200, while the sum is 48.

The spelling of 18914191554 in words is "eighteen billion, nine hundred fourteen million, one hundred ninety-one thousand, five hundred fifty-four".