20134243212240 has 80 divisors (see below), whose sum is σ = 63347738395968. Its totient is φ = 5288995227648.

The previous prime is 20134243212179. The next prime is 20134243212263. The reversal of 20134243212240 is 4221234243102.

It is a tau number, because it is divible by the number of its divisors (80).

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 = 20134243212198 and 20134243212207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 626048697 + ... + 626080856.

Almost surely, 2^{20134243212240} is an apocalyptic number.

20134243212240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20134243212240 is an abundant number, since it is smaller than the sum of its proper divisors (43213495183728).

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

20134243212240 is a wasteful number, since it uses less digits than its factorization.

20134243212240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252129636 (or 1252129630 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 20134243212240 its reverse (4221234243102), we get a palindrome (24355477455342).

The spelling of 20134243212240 in words is "twenty trillion, one hundred thirty-four billion, two hundred forty-three million, two hundred twelve thousand, two hundred forty".