20146869605 has 16 divisors (see below), whose sum is σ = 24286878000. Its totient is φ = 16043900928.

The previous prime is 20146869577. The next prime is 20146869637. The reversal of 20146869605 is 50696864102.

It can be written as a sum of positive squares in 8 ways, for example, as 200109316 + 19946760289 = 14146^2 + 141233^2 .

It is a cyclic number.

It is not a de Polignac number, because 20146869605 - 2⁸ = 20146869349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20146869605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1037021 + ... + 1056269.

It is an arithmetic number, because the mean of its divisors is an integer number (1517929875).

Almost surely, 2^20146869605 is an apocalyptic number.

It is an amenable number.

20146869605 is a deficient number, since it is larger than the sum of its proper divisors (4140008395).

20146869605 is a wasteful number, since it uses less digits than its factorization.

20146869605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20200.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 20146869605 in words is "twenty billion, one hundred forty-six million, eight hundred sixty-nine thousand, six hundred five".