18899856055 has 4 divisors (see below), whose sum is σ = 22679827272. Its totient is φ = 15119884840.

The previous prime is 18899855939. The next prime is 18899856061. The reversal of 18899856055 is 55065899881.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 18899856055 - 2⁹ = 18899855543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1889985601 + ... + 1889985610.

It is an arithmetic number, because the mean of its divisors is an integer number (5669956818).

Almost surely, 2^18899856055 is an apocalyptic number.

18899856055 is a deficient number, since it is larger than the sum of its proper divisors (3779971217).

18899856055 is an equidigital number, since it uses as much as digits as its factorization.

18899856055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3779971216.

The product of its (nonzero) digits is 31104000, while the sum is 64.

The spelling of 18899856055 in words is "eighteen billion, eight hundred ninety-nine million, eight hundred fifty-six thousand, fifty-five".