20366417605 has 16 divisors (see below), whose sum is σ = 25883321904. Its totient is φ = 15331164160.

The previous prime is 20366417597. The next prime is 20366417629. The reversal of 20366417605 is 50671466302.

It can be written as a sum of positive squares in 8 ways, for example, as 2358656356 + 18007761249 = 48566^2 + 134193^2 .

It is not a de Polignac number, because 20366417605 - 2³ = 20366417597 is a prime.

It is a super-2 number, since 2×20366417605² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375909 + ... + 426661.

It is an arithmetic number, because the mean of its divisors is an integer number (1617707619).

Almost surely, 2^20366417605 is an apocalyptic number.

It is an amenable number.

20366417605 is a deficient number, since it is larger than the sum of its proper divisors (5516904299).

20366417605 is a wasteful number, since it uses less digits than its factorization.

20366417605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55496.

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 20366417605 in words is "twenty billion, three hundred sixty-six million, four hundred seventeen thousand, six hundred five".