18709988054 has 4 divisors (see below), whose sum is σ = 28064982084. Its totient is φ = 9354994026.

The previous prime is 18709988039. The next prime is 18709988081. The reversal of 18709988054 is 45088990781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45088990781 = 2069 ⋅21792649.

It is a junction number, because it is equal to n+sod(n) for n = 18709987984 and 18709988002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4677497012 + ... + 4677497015.

It is an arithmetic number, because the mean of its divisors is an integer number (7016245521).

Almost surely, 2^18709988054 is an apocalyptic number.

18709988054 is a deficient number, since it is larger than the sum of its proper divisors (9354994030).

18709988054 is an equidigital number, since it uses as much as digits as its factorization.

18709988054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9354994029.

The product of its (nonzero) digits is 5806080, while the sum is 59.

The spelling of 18709988054 in words is "eighteen billion, seven hundred nine million, nine hundred eighty-eight thousand, fifty-four".