18018993454 has 32 divisors (see below), whose sum is σ = 35162989056. Its totient is φ = 6715151520.

The previous prime is 18018993439. The next prime is 18018993493. The reversal of 18018993454 is 45439981081.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2540077 + ... + 2547160.

It is an arithmetic number, because the mean of its divisors is an integer number (1098843408).

Almost surely, 2^18018993454 is an apocalyptic number.

18018993454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18018993454 is a deficient number, since it is larger than the sum of its proper divisors (17143995602).

18018993454 is a wasteful number, since it uses less digits than its factorization.

18018993454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5087280.

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 18018993454 in words is "eighteen billion, eighteen million, nine hundred ninety-three thousand, four hundred fifty-four".