21240530113343 has 16 divisors (see below), whose sum is σ = 22099189432320. Its totient is φ = 20392725628800.

The previous prime is 21240530113339. The next prime is 21240530113409. The reversal of 21240530113343 is 34331103504212.

It is a cyclic number.

It is not a de Polignac number, because 21240530113343 - 2² = 21240530113339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21240530113043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122436698 + ... + 122610056.

It is an arithmetic number, because the mean of its divisors is an integer number (1381199339520).

Almost surely, 2^{21240530113343} is an apocalyptic number.

21240530113343 is a deficient number, since it is larger than the sum of its proper divisors (858659318977).

21240530113343 is a wasteful number, since it uses less digits than its factorization.

21240530113343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204638.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 21240530113343 its reverse (34331103504212), we get a palindrome (55571633617555).

The spelling of 21240530113343 in words is "twenty-one trillion, two hundred forty billion, five hundred thirty million, one hundred thirteen thousand, three hundred forty-three".