19666098 has 16 divisors (see below), whose sum is σ = 43702560. Its totient is φ = 6555348.

The previous prime is 19666091. The next prime is 19666109. The reversal of 19666098 is 89066691.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19666091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182040 + ... + 182147.

It is an arithmetic number, because the mean of its divisors is an integer number (2731410).

Almost surely, 2^19666098 is an apocalyptic number.

19666098 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19666098 is an abundant number, since it is smaller than the sum of its proper divisors (24036462).

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

19666098 is a wasteful number, since it uses less digits than its factorization.

19666098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364198 (or 364192 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 19666098 is about 4434.6474493470. The cubic root of 19666098 is about 269.9226939173.

The spelling of 19666098 in words is "nineteen million, six hundred sixty-six thousand, ninety-eight".