18898237955 has 4 divisors (see below), whose sum is σ = 22677885552. Its totient is φ = 15118590360.

The previous prime is 18898237927. The next prime is 18898237961. The reversal of 18898237955 is 55973289881.

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

It is not a de Polignac number, because 18898237955 - 2²⁴ = 18881460739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18898237891 and 18898237900.

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, 1889823791 + ... + 1889823800.

It is an arithmetic number, because the mean of its divisors is an integer number (5669471388).

Almost surely, 2^18898237955 is an apocalyptic number.

18898237955 is a deficient number, since it is larger than the sum of its proper divisors (3779647597).

18898237955 is an equidigital number, since it uses as much as digits as its factorization.

18898237955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3779647596.

The product of its digits is 43545600, while the sum is 65.

The spelling of 18898237955 in words is "eighteen billion, eight hundred ninety-eight million, two hundred thirty-seven thousand, nine hundred fifty-five".