19880118 has 24 divisors (see below), whose sum is σ = 45341400. Its totient is φ = 6277824.

The previous prime is 19880117. The next prime is 19880129. The reversal of 19880118 is 81108891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19880111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28723 + ... + 29406.

It is an arithmetic number, because the mean of its divisors is an integer number (1889225).

Almost surely, 2^19880118 is an apocalyptic number.

19880118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19880118 is an abundant number, since it is smaller than the sum of its proper divisors (25461282).

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

19880118 is a wasteful number, since it uses less digits than its factorization.

19880118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58156 (or 58153 counting only the distinct ones).

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

The square root of 19880118 is about 4458.7125944604. The cubic root of 19880118 is about 270.8983247158.

The spelling of 19880118 in words is "nineteen million, eight hundred eighty thousand, one hundred eighteen".