21602340180593 has 2 divisors, whose sum is σ = 21602340180594. Its totient is φ = 21602340180592.

The previous prime is 21602340180497. The next prime is 21602340180599. The reversal of 21602340180593 is 39508104320612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21471203492209 + 131136688384 = 4633703^2 + 362128^2 .

It is a cyclic number.

It is not a de Polignac number, because 21602340180593 - 2¹⁰ = 21602340179569 is a prime.

It is a super-2 number, since 2×21602340180593² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21602340180599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10801170090296 + 10801170090297.

It is an arithmetic number, because the mean of its divisors is an integer number (10801170090297).

Almost surely, 2^{21602340180593} is an apocalyptic number.

It is an amenable number.

21602340180593 is a deficient number, since it is larger than the sum of its proper divisors (1).

21602340180593 is an equidigital number, since it uses as much as digits as its factorization.

21602340180593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 21602340180593 in words is "twenty-one trillion, six hundred two billion, three hundred forty million, one hundred eighty thousand, five hundred ninety-three".