21756372313342 has 32 divisors (see below), whose sum is σ = 34868595617280. Its totient is φ = 10150754137920.

The previous prime is 21756372313327. The next prime is 21756372313397. The reversal of 21756372313342 is 24331327365712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23729467 + ... + 24629257.

It is an arithmetic number, because the mean of its divisors is an integer number (1089643613040).

Almost surely, 2^{21756372313342} is an apocalyptic number.

21756372313342 is a deficient number, since it is larger than the sum of its proper divisors (13112223303938).

21756372313342 is a wasteful number, since it uses less digits than its factorization.

21756372313342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909376.

The product of its digits is 3810240, while the sum is 49.

The spelling of 21756372313342 in words is "twenty-one trillion, seven hundred fifty-six billion, three hundred seventy-two million, three hundred thirteen thousand, three hundred forty-two".