21500157714353 has 8 divisors (see below), whose sum is σ = 22065717579048. Its totient is φ = 20940519942784.

The previous prime is 21500157714317. The next prime is 21500157714457. The reversal of 21500157714353 is 35341775100512.

It can be written as a sum of positive squares in 4 ways, for example, as 882128573089 + 20618029141264 = 939217^2 + 4540708^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21500157714353 - 2⁸ = 21500157714097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21500157714953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1480515926 + ... + 1480530447.

It is an arithmetic number, because the mean of its divisors is an integer number (2758214697381).

Almost surely, 2^{21500157714353} is an apocalyptic number.

It is an amenable number.

21500157714353 is a deficient number, since it is larger than the sum of its proper divisors (565559864695).

21500157714353 is a wasteful number, since it uses less digits than its factorization.

21500157714353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961046563.

The product of its (nonzero) digits is 441000, while the sum is 44.

The spelling of 21500157714353 in words is "twenty-one trillion, five hundred billion, one hundred fifty-seven million, seven hundred fourteen thousand, three hundred fifty-three".