21513532425342 has 8 divisors (see below), whose sum is σ = 43027064850696. Its totient is φ = 7171177475112.

The previous prime is 21513532425331. The next prime is 21513532425361. The reversal of 21513532425342 is 24352423531512.

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

21513532425342 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21513532425294 and 21513532425303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1792794368773 + ... + 1792794368784.

It is an arithmetic number, because the mean of its divisors is an integer number (5378383106337).

Almost surely, 2^{21513532425342} is an apocalyptic number.

21513532425342 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21513532425342 is a wasteful number, since it uses less digits than its factorization.

21513532425342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3585588737562.

The product of its digits is 864000, while the sum is 42.

Adding to 21513532425342 its reverse (24352423531512), we get a palindrome (45865955956854).

The spelling of 21513532425342 in words is "twenty-one trillion, five hundred thirteen billion, five hundred thirty-two million, four hundred twenty-five thousand, three hundred forty-two".