21727593357 has 8 divisors (see below), whose sum is σ = 29020334976. Its totient is φ = 14459956992.

The previous prime is 21727593347. The next prime is 21727593373. The reversal of 21727593357 is 75339572712.

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

It is not a de Polignac number, because 21727593357 - 2¹⁴ = 21727576973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21727593347) 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, 6274293 + ... + 6277754.

It is an arithmetic number, because the mean of its divisors is an integer number (3627541872).

Almost surely, 2^21727593357 is an apocalyptic number.

It is an amenable number.

21727593357 is a deficient number, since it is larger than the sum of its proper divisors (7292741619).

21727593357 is a wasteful number, since it uses less digits than its factorization.

21727593357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12552627.

The product of its digits is 2778300, while the sum is 51.

The spelling of 21727593357 in words is "twenty-one billion, seven hundred twenty-seven million, five hundred ninety-three thousand, three hundred fifty-seven".