18277849908 has 120 divisors (see below), whose sum is σ = 48299328000. Its totient is φ = 6027037632.

The previous prime is 18277849907. The next prime is 18277849927. The reversal of 18277849908 is 80994877281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18277849903) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12701053 + ... + 12702491.

It is an arithmetic number, because the mean of its divisors is an integer number (402494400).

Almost surely, 2^18277849908 is an apocalyptic number.

18277849908 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18277849908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24149664000).

18277849908 is an abundant number, since it is smaller than the sum of its proper divisors (30021478092).

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

18277849908 is a wasteful number, since it uses less digits than its factorization.

18277849908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851 (or 1840 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 63.

The spelling of 18277849908 in words is "eighteen billion, two hundred seventy-seven million, eight hundred forty-nine thousand, nine hundred eight".