19985036 has 24 divisors (see below), whose sum is σ = 36960000. Its totient is φ = 9429264.

The previous prime is 19985033. The next prime is 19985051. The reversal of 19985036 is 63058991.

It is a junction number, because it is equal to n+sod(n) for n = 19984984 and 19985002.

It is not an unprimeable number, because it can be changed into a prime (19985033) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 33065 + ... + 33663.

It is an arithmetic number, because the mean of its divisors is an integer number (1540000).

Almost surely, 2^19985036 is an apocalyptic number.

It is an amenable number.

19985036 is a deficient number, since it is larger than the sum of its proper divisors (16974964).

19985036 is a wasteful number, since it uses less digits than its factorization.

19985036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061 (or 1059 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 19985036 is about 4470.4626158822. The cubic root of 19985036 is about 271.3740471933.

The spelling of 19985036 in words is "nineteen million, nine hundred eighty-five thousand, thirty-six".