20211340242340 has 48 divisors (see below), whose sum is σ = 47696059127808. Its totient is φ = 7138185715584.

The previous prime is 20211340242293. The next prime is 20211340242439. The reversal of 20211340242340 is 4324204311202.

It is a junction number, because it is equal to n+sod(n) for n = 20211340242299 and 20211340242308.

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, 1689905412 + ... + 1689917371.

It is an arithmetic number, because the mean of its divisors is an integer number (993667898496).

Almost surely, 2^{20211340242340} is an apocalyptic number.

20211340242340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211340242340 is an abundant number, since it is smaller than the sum of its proper divisors (27484718885468).

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

20211340242340 is a wasteful number, since it uses less digits than its factorization.

20211340242340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379822828 (or 3379822826 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 20211340242340 its reverse (4324204311202), we get a palindrome (24535544553542).

The spelling of 20211340242340 in words is "twenty trillion, two hundred eleven billion, three hundred forty million, two hundred forty-two thousand, three hundred forty".