19975267986 has 32 divisors (see below), whose sum is σ = 42094952640. Its totient is φ = 6301715904.

The previous prime is 19975267981. The next prime is 19975267987. The reversal of 19975267986 is 68976257991.

It is a super-2 number, since 2×19975267986² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19975267986.

It is not an unprimeable number, because it can be changed into a prime (19975267981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28996 + ... + 201968.

It is an arithmetic number, because the mean of its divisors is an integer number (1315467270).

Almost surely, 2^19975267986 is an apocalyptic number.

19975267986 is an abundant number, since it is smaller than the sum of its proper divisors (22119684654).

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

19975267986 is a wasteful number, since it uses less digits than its factorization.

19975267986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174010.

The product of its digits is 102876480, while the sum is 69.

The spelling of 19975267986 in words is "nineteen billion, nine hundred seventy-five million, two hundred sixty-seven thousand, nine hundred eighty-six".