21513501401342 has 8 divisors (see below), whose sum is σ = 32273953269600. Its totient is φ = 10755516978144.

The previous prime is 21513501401279. The next prime is 21513501401369. The reversal of 21513501401342 is 24310410531512.

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

It is a junction number, because it is equal to n+sod(n) for n = 21513501401299 and 21513501401308.

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, 616839467 + ... + 616874342.

It is an arithmetic number, because the mean of its divisors is an integer number (4034244158700).

Almost surely, 2^{21513501401342} is an apocalyptic number.

21513501401342 is a deficient number, since it is larger than the sum of its proper divisors (10760451868258).

21513501401342 is a wasteful number, since it uses less digits than its factorization.

21513501401342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233722530.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 21513501401342 its reverse (24310410531512), we get a palindrome (45823911932854).

The spelling of 21513501401342 in words is "twenty-one trillion, five hundred thirteen billion, five hundred one million, four hundred one thousand, three hundred forty-two".