21375062104605 has 64 divisors (see below), whose sum is σ = 37541010788352. Its totient is φ = 10299284317440.

The previous prime is 21375062104523. The next prime is 21375062104609. The reversal of 21375062104605 is 50640126057312.

It is not a de Polignac number, because 21375062104605 - 2⁹ = 21375062104093 is a prime.

It is a super-3 number, since 3×21375062104605³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21375062104609) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 490085779 + ... + 490129391.

It is an arithmetic number, because the mean of its divisors is an integer number (586578293568).

Almost surely, 2^{21375062104605} is an apocalyptic number.

It is an amenable number.

21375062104605 is a deficient number, since it is larger than the sum of its proper divisors (16165948683747).

21375062104605 is a wasteful number, since it uses less digits than its factorization.

21375062104605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62018.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 21375062104605 in words is "twenty-one trillion, three hundred seventy-five billion, sixty-two million, one hundred four thousand, six hundred five".