19918098 has 24 divisors (see below), whose sum is σ = 43250688. Its totient is φ = 6624792.

The previous prime is 19918097. The next prime is 19918103. The reversal of 19918098 is 89081991.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19918097) 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, 10015 + ... + 11837.

It is an arithmetic number, because the mean of its divisors is an integer number (1802112).

Almost surely, 2^19918098 is an apocalyptic number.

19918098 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19918098 is an abundant number, since it is smaller than the sum of its proper divisors (23332590).

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

19918098 is a wasteful number, since it uses less digits than its factorization.

19918098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2438 (or 2435 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The square root of 19918098 is about 4462.9696391528. The cubic root of 19918098 is about 271.0707276712.

The spelling of 19918098 in words is "nineteen million, nine hundred eighteen thousand, ninety-eight".