20636610344240 has 160 divisors (see below), whose sum is σ = 53801457111360. Its totient is φ = 7295311872000.

The previous prime is 20636610344213. The next prime is 20636610344243. The reversal of 20636610344240 is 4244301663602.

It is a super-3 number, since 3×20636610344240³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20636610344243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38840696 + ... + 39368424.

It is an arithmetic number, because the mean of its divisors is an integer number (336259106946).

Almost surely, 2^{20636610344240} is an apocalyptic number.

20636610344240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20636610344240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26900728555680).

20636610344240 is an abundant number, since it is smaller than the sum of its proper divisors (33164846767120).

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

20636610344240 is a wasteful number, since it uses less digits than its factorization.

20636610344240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528991 (or 528985 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 41.

The spelling of 20636610344240 in words is "twenty trillion, six hundred thirty-six billion, six hundred ten million, three hundred forty-four thousand, two hundred forty".