20105409293 has 4 divisors (see below), whose sum is σ = 20210673408. Its totient is φ = 20000145180.

The previous prime is 20105409283. The next prime is 20105409307. The reversal of 20105409293 is 39290450102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39290450102 = 2 ⋅19645225051.

It is a cyclic number.

It is not a de Polignac number, because 20105409293 - 2¹⁸ = 20105147149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20105409283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52631771 + ... + 52632152.

It is an arithmetic number, because the mean of its divisors is an integer number (5052668352).

Almost surely, 2^20105409293 is an apocalyptic number.

It is an amenable number.

20105409293 is a deficient number, since it is larger than the sum of its proper divisors (105264115).

20105409293 is a wasteful number, since it uses less digits than its factorization.

20105409293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105264114.

The product of its (nonzero) digits is 19440, while the sum is 35.

Adding to 20105409293 its reverse (39290450102), we get a palindrome (59395859395).

The spelling of 20105409293 in words is "twenty billion, one hundred five million, four hundred nine thousand, two hundred ninety-three".