21663036235342 has 4 divisors (see below), whose sum is σ = 32494554353016. Its totient is φ = 10831518117670.

The previous prime is 21663036235201. The next prime is 21663036235361. The reversal of 21663036235342 is 24353263036612.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21663036235292 and 21663036235301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5415759058834 + ... + 5415759058837.

It is an arithmetic number, because the mean of its divisors is an integer number (8123638588254).

Almost surely, 2^{21663036235342} is an apocalyptic number.

21663036235342 is a deficient number, since it is larger than the sum of its proper divisors (10831518117674).

21663036235342 is a wasteful number, since it uses less digits than its factorization.

21663036235342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10831518117673.

The product of its (nonzero) digits is 2799360, while the sum is 46.

The spelling of 21663036235342 in words is "twenty-one trillion, six hundred sixty-three billion, thirty-six million, two hundred thirty-five thousand, three hundred forty-two".