18056103128 has 32 divisors (see below), whose sum is σ = 38700288000. Its totient is φ = 7736602272.

The previous prime is 18056103127. The next prime is 18056103133. The reversal of 18056103128 is 82130165081.

It is a Cunningham number, because it is equal to 134373²-1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18056103127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235151 + ... + 302337.

It is an arithmetic number, because the mean of its divisors is an integer number (1209384000).

Almost surely, 2^18056103128 is an apocalyptic number.

It is an amenable number.

18056103128 is an abundant number, since it is smaller than the sum of its proper divisors (20644184872).

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

18056103128 is a wasteful number, since it uses less digits than its factorization.

18056103128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71999 (or 71995 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The spelling of 18056103128 in words is "eighteen billion, fifty-six million, one hundred three thousand, one hundred twenty-eight".