20004543312240 has 40 divisors (see below), whose sum is σ = 62014084268688. Its totient is φ = 5334544883200.

The previous prime is 20004543312133. The next prime is 20004543312241. The reversal of 20004543312240 is 4221334540002.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×20004543312240² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 20004543312198 and 20004543312207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004543312241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41676131661 + ... + 41676132140.

Almost surely, 2^{20004543312240} is an apocalyptic number.

20004543312240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20004543312240 is an abundant number, since it is smaller than the sum of its proper divisors (42009540956448).

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

20004543312240 is a wasteful number, since it uses less digits than its factorization.

20004543312240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83352263817 (or 83352263811 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 20004543312240 its reverse (4221334540002), we get a palindrome (24225877852242).

The spelling of 20004543312240 in words is "twenty trillion, four billion, five hundred forty-three million, three hundred twelve thousand, two hundred forty".