20041023405 has 32 divisors (see below), whose sum is σ = 34656983424. Its totient is φ = 9830704896.

The previous prime is 20041023403. The next prime is 20041023419. The reversal of 20041023405 is 50432014002.

It is not a de Polignac number, because 20041023405 - 2¹ = 20041023403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20041023403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131499 + ... + 239528.

It is an arithmetic number, because the mean of its divisors is an integer number (1083030732).

Almost surely, 2^20041023405 is an apocalyptic number.

It is an amenable number.

20041023405 is a deficient number, since it is larger than the sum of its proper divisors (14615960019).

20041023405 is a wasteful number, since it uses less digits than its factorization.

20041023405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371325.

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 20041023405 its reverse (50432014002), we get a palindrome (70473037407).

The spelling of 20041023405 in words is "twenty billion, forty-one million, twenty-three thousand, four hundred five".