20011997286 has 24 divisors (see below), whose sum is σ = 43386472584. Its totient is φ = 6666489600.

The previous prime is 20011997281. The next prime is 20011997311. The reversal of 20011997286 is 68279911002.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011997281) 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 11 ways as a sum of consecutive naturals, for example, 318396 + ... + 376031.

It is an arithmetic number, because the mean of its divisors is an integer number (1807769691).

Almost surely, 2^20011997286 is an apocalyptic number.

20011997286 is an abundant number, since it is smaller than the sum of its proper divisors (23374475298).

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

20011997286 is a wasteful number, since it uses less digits than its factorization.

20011997286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696036 (or 696033 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The spelling of 20011997286 in words is "twenty billion, eleven million, nine hundred ninety-seven thousand, two hundred eighty-six".