19986130 has 16 divisors (see below), whose sum is σ = 36128664. Its totient is φ = 7960320.

The previous prime is 19986121. The next prime is 19986137. The reversal of 19986130 is 3168991.

It can be written as a sum of positive squares in 4 ways, for example, as 15705369 + 4280761 = 3963^2 + 2069^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19986130.

It is not an unprimeable number, because it can be changed into a prime (19986137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1737 + ... + 6556.

Almost surely, 2^19986130 is an apocalyptic number.

19986130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19986130 is a deficient number, since it is larger than the sum of its proper divisors (16142534).

19986130 is a wasteful number, since it uses less digits than its factorization.

19986130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8541.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 19986130 is about 4470.5849729090. The cubic root of 19986130 is about 271.3789988614.

It can be divided in two parts, 1998 and 6130, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 19986130 in words is "nineteen million, nine hundred eighty-six thousand, one hundred thirty".