21152350531365 has 8 divisors (see below), whose sum is σ = 33843760850208. Its totient is φ = 11281253616720.

The previous prime is 21152350531289. The next prime is 21152350531373. The reversal of 21152350531365 is 56313505325112.

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

It is not a de Polignac number, because 21152350531365 - 2⁷ = 21152350531237 is a prime.

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, 705078351031 + ... + 705078351060.

It is an arithmetic number, because the mean of its divisors is an integer number (4230470106276).

Almost surely, 2^{21152350531365} is an apocalyptic number.

It is an amenable number.

21152350531365 is a deficient number, since it is larger than the sum of its proper divisors (12691410318843).

21152350531365 is a wasteful number, since it uses less digits than its factorization.

21152350531365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410156702099.

The product of its (nonzero) digits is 405000, while the sum is 42.

Adding to 21152350531365 its reverse (56313505325112), we get a palindrome (77465855856477).

The spelling of 21152350531365 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred fifty million, five hundred thirty-one thousand, three hundred sixty-five".