120019986 has 24 divisors (see below), whose sum is σ = 260480064. Its totient is φ = 39939480.

The previous prime is 120019969. The next prime is 120019987. The reversal of 120019986 is 689910021.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 120019986.

It is not an unprimeable number, because it can be changed into a prime (120019987) 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 11 ways as a sum of consecutive naturals, for example, 6075 + ... + 16641.

It is an arithmetic number, because the mean of its divisors is an integer number (10853336).

Almost surely, 2^120019986 is an apocalyptic number.

120019986 is an abundant number, since it is smaller than the sum of its proper divisors (140460078).

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

120019986 is a wasteful number, since it uses less digits than its factorization.

120019986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11206 (or 11203 counting only the distinct ones).

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

The square root of 120019986 is about 10955.3633440430. The cubic root of 120019986 is about 493.2697965207.

The spelling of 120019986 in words is "one hundred twenty million, nineteen thousand, nine hundred eighty-six".