21242862353 has 8 divisors (see below), whose sum is σ = 23333121600. Its totient is φ = 19249824528.

The previous prime is 21242862341. The next prime is 21242862401. The reversal of 21242862353 is 35326824212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21242862353 - 2²⁰ = 21241813777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21242865353) 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, 24304898 + ... + 24305771.

It is an arithmetic number, because the mean of its divisors is an integer number (2916640200).

Almost surely, 2^21242862353 is an apocalyptic number.

21242862353 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21242862353 is a deficient number, since it is larger than the sum of its proper divisors (2090259247).

21242862353 is a wasteful number, since it uses less digits than its factorization.

21242862353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48610711.

The product of its digits is 138240, while the sum is 38.

The spelling of 21242862353 in words is "twenty-one billion, two hundred forty-two million, eight hundred sixty-two thousand, three hundred fifty-three".