20218375086 has 64 divisors (see below), whose sum is σ = 49982220288. Its totient is φ = 5309399808.

The previous prime is 20218374991. The next prime is 20218375091. The reversal of 20218375086 is 68057381202.

It is a super-3 number, since 3×20218375086³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47755 + ... + 206681.

It is an arithmetic number, because the mean of its divisors is an integer number (780972192).

Almost surely, 2^20218375086 is an apocalyptic number.

20218375086 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20218375086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24991110144).

20218375086 is an abundant number, since it is smaller than the sum of its proper divisors (29763845202).

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

20218375086 is a wasteful number, since it uses less digits than its factorization.

20218375086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159185.

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 20218375086 in words is "twenty billion, two hundred eighteen million, three hundred seventy-five thousand, eighty-six".