20218081104 has 90 divisors (see below), whose sum is σ = 61269931710. Its totient is φ = 6220940544.

The previous prime is 20218081087. The next prime is 20218081109. The reversal of 20218081104 is 40118081202.

It can be written as a sum of positive squares in 3 ways, for example, as 10890000 + 20207191104 = 3300^2 + 142152^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20218081109) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 391059 + ... + 439730.

It is an arithmetic number, because the mean of its divisors is an integer number (680777019).

Almost surely, 2^20218081104 is an apocalyptic number.

20218081104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20218081104 is an abundant number, since it is smaller than the sum of its proper divisors (41051850606).

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

20218081104 is a wasteful number, since it uses less digits than its factorization.

20218081104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830829 (or 830807 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The spelling of 20218081104 in words is "twenty billion, two hundred eighteen million, eighty-one thousand, one hundred four".