1918018008 has 128 divisors (see below), whose sum is σ = 5557248000. Its totient is φ = 612178560.

The previous prime is 1918017953. The next prime is 1918018057. The reversal of 1918018008 is 8008108191.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 794323 + ... + 796733.

It is an arithmetic number, because the mean of its divisors is an integer number (43416000).

Almost surely, 2^1918018008 is an apocalyptic number.

1918018008 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 1918018008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2778624000).

1918018008 is an abundant number, since it is smaller than the sum of its proper divisors (3639229992).

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

1918018008 is a wasteful number, since it uses less digits than its factorization.

1918018008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582 (or 2572 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The square root of 1918018008 is about 43795.1824747883. The cubic root of 1918018008 is about 1242.4651808327.

It can be divided in two parts, 191801 and 8008, that added together give a square (199809 = 447²).

The spelling of 1918018008 in words is "one billion, nine hundred eighteen million, eighteen thousand, eight".