20809868150 has 12 divisors (see below), whose sum is σ = 38706354852. Its totient is φ = 8323947240.

The previous prime is 20809868141. The next prime is 20809868159. The reversal of 20809868150 is 5186890802.

It is an interprime number because it is at equal distance from previous prime (20809868141) and next prime (20809868159).

It is a super-2 number, since 2×20809868150² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20809868095 and 20809868104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20809868159) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 208098632 + ... + 208098731.

It is an arithmetic number, because the mean of its divisors is an integer number (3225529571).

Almost surely, 2^20809868150 is an apocalyptic number.

20809868150 is a deficient number, since it is larger than the sum of its proper divisors (17896486702).

20809868150 is a wasteful number, since it uses less digits than its factorization.

20809868150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416197375 (or 416197370 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 47.

The spelling of 20809868150 in words is "twenty billion, eight hundred nine million, eight hundred sixty-eight thousand, one hundred fifty".