21240522341 has 4 divisors (see below), whose sum is σ = 21334093152. Its totient is φ = 21146951532.

The previous prime is 21240522311. The next prime is 21240522343. The reversal of 21240522341 is 14322504212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21240522341 - 2²² = 21236328037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21240522341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21240522343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46785065 + ... + 46785518.

It is an arithmetic number, because the mean of its divisors is an integer number (5333523288).

Almost surely, 2^21240522341 is an apocalyptic number.

It is an amenable number.

21240522341 is a deficient number, since it is larger than the sum of its proper divisors (93570811).

21240522341 is an equidigital number, since it uses as much as digits as its factorization.

21240522341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93570810.

The product of its (nonzero) digits is 3840, while the sum is 26.

The spelling of 21240522341 in words is "twenty-one billion, two hundred forty million, five hundred twenty-two thousand, three hundred forty-one".