20012144405 has 64 divisors (see below), whose sum is σ = 29943820800. Its totient is φ = 12650373120.

The previous prime is 20012144329. The next prime is 20012144407. The reversal of 20012144405 is 50444121002.

It is not a de Polignac number, because 20012144405 - 2²² = 20007950101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012144407) 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, 607601 + ... + 639689.

It is an arithmetic number, because the mean of its divisors is an integer number (467872200).

Almost surely, 2^20012144405 is an apocalyptic number.

It is an amenable number.

20012144405 is a deficient number, since it is larger than the sum of its proper divisors (9931676395).

20012144405 is a wasteful number, since it uses less digits than its factorization.

20012144405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32174.

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 20012144405 its reverse (50444121002), we get a palindrome (70456265407).

The spelling of 20012144405 in words is "twenty billion, twelve million, one hundred forty-four thousand, four hundred five".