21342442113 has 64 divisors (see below), whose sum is σ = 34100352000. Its totient is φ = 13151693952.

The previous prime is 21342442103. The next prime is 21342442117. The reversal of 21342442113 is 31124424312.

21342442113 is a `hidden beast` number, since 21 + 3 + 424 + 4 + 211 + 3 = 666.

It is not a de Polignac number, because 21342442113 - 2¹⁰ = 21342441089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21342442117) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4144006 + ... + 4149152.

It is an arithmetic number, because the mean of its divisors is an integer number (532818000).

Almost surely, 2^21342442113 is an apocalyptic number.

It is an amenable number.

21342442113 is a deficient number, since it is larger than the sum of its proper divisors (12757909887).

21342442113 is a wasteful number, since it uses less digits than its factorization.

21342442113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5371 (or 5365 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 21342442113 its reverse (31124424312), we get a palindrome (52466866425).

The spelling of 21342442113 in words is "twenty-one billion, three hundred forty-two million, four hundred forty-two thousand, one hundred thirteen".