21683615608342 has 16 divisors (see below), whose sum is σ = 32549769354960. Its totient is φ = 10833694276608.

The previous prime is 21683615608337. The next prime is 21683615608351. The reversal of 21683615608342 is 24380651638612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24083334 + ... + 24967462.

It is an arithmetic number, because the mean of its divisors is an integer number (2034360584685).

Almost surely, 2^{21683615608342} is an apocalyptic number.

21683615608342 is a deficient number, since it is larger than the sum of its proper divisors (10866153746618).

21683615608342 is a wasteful number, since it uses less digits than its factorization.

21683615608342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893295.

The product of its (nonzero) digits is 9953280, while the sum is 55.

The spelling of 21683615608342 in words is "twenty-one trillion, six hundred eighty-three billion, six hundred fifteen million, six hundred eight thousand, three hundred forty-two".