1020181986 has 16 divisors (see below), whose sum is σ = 2267071200. Its totient is φ = 340060644.

The previous prime is 1020181973. The next prime is 1020181993. The reversal of 1020181986 is 6891810201.

It is a self number, because there is not a number n which added to its sum of digits gives 1020181986.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9446076 + ... + 9446183.

It is an arithmetic number, because the mean of its divisors is an integer number (141691950).

Almost surely, 2^1020181986 is an apocalyptic number.

1020181986 is an abundant number, since it is smaller than the sum of its proper divisors (1246889214).

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

1020181986 is a wasteful number, since it uses less digits than its factorization.

1020181986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18892270 (or 18892264 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 1020181986 is about 31940.2878196174. The cubic root of 1020181986 is about 1006.6825724185.

The spelling of 1020181986 in words is "one billion, twenty million, one hundred eighty-one thousand, nine hundred eighty-six".