19986102 has 40 divisors (see below), whose sum is σ = 45241416. Its totient is φ = 6594048.

The previous prime is 19986091. The next prime is 19986121. The reversal of 19986102 is 20168991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16758 + ... + 17910.

Almost surely, 2^19986102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19986102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22620708).

19986102 is an abundant number, since it is smaller than the sum of its proper divisors (25255314).

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

19986102 is a wasteful number, since it uses less digits than its factorization.

19986102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274 (or 1265 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 19986102 is about 4470.5818413267. The cubic root of 19986102 is about 271.3788721299.

It can be divided in two parts, 1998 and 6102, that added together give a square (8100 = 90²).

The spelling of 19986102 in words is "nineteen million, nine hundred eighty-six thousand, one hundred two".