18200920086 has 96 divisors (see below), whose sum is σ = 43616439360. Its totient is φ = 5459392512.

The previous prime is 18200920081. The next prime is 18200920091. The reversal of 18200920086 is 68002900281.

It is an interprime number because it is at equal distance from previous prime (18200920081) and next prime (18200920091).

It is a self number, because there is not a number n which added to its sum of digits gives 18200920086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18200920081) 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 47 ways as a sum of consecutive naturals, for example, 904066 + ... + 923978.

It is an arithmetic number, because the mean of its divisors is an integer number (454337910).

Almost surely, 2^18200920086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18200920086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21808219680).

18200920086 is an abundant number, since it is smaller than the sum of its proper divisors (25415519274).

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

18200920086 is a wasteful number, since it uses less digits than its factorization.

18200920086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20070 (or 20067 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 18200920086 in words is "eighteen billion, two hundred million, nine hundred twenty thousand, eighty-six".