21500231670514 has 8 divisors (see below), whose sum is σ = 32307026501340. Its totient is φ = 10731222836736.

The previous prime is 21500231670503. The next prime is 21500231670557. The reversal of 21500231670514 is 41507613200512.

It can be written as a sum of positive squares in 2 ways, for example, as 21042247875489 + 457983795025 = 4587183^2 + 676745^2 .

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

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, 9446497839 + ... + 9446500114.

Almost surely, 2^{21500231670514} is an apocalyptic number.

21500231670514 is a deficient number, since it is larger than the sum of its proper divisors (10806794830826).

21500231670514 is a wasteful number, since it uses less digits than its factorization.

21500231670514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18892998524.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 21500231670514 in words is "twenty-one trillion, five hundred billion, two hundred thirty-one million, six hundred seventy thousand, five hundred fourteen".