19980036 has 36 divisors (see below), whose sum is σ = 51683632. Its totient is φ = 6504624.

The previous prime is 19980019. The next prime is 19980041. The reversal of 19980036 is 63008991.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×19980036² = 798403677122592, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4906 + ... + 8001.

Almost surely, 2^19980036 is an apocalyptic number.

It is an amenable number.

19980036 is an abundant number, since it is smaller than the sum of its proper divisors (31703596).

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

19980036 is a wasteful number, since it uses less digits than its factorization.

19980036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12960 (or 12955 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 19980036 is about 4469.9033546599. The cubic root of 19980036 is about 271.3514138689.

The spelling of 19980036 in words is "nineteen million, nine hundred eighty thousand, thirty-six".