20005423055 has 16 divisors (see below), whose sum is σ = 24452479584. Its totient is φ = 15708151680.

The previous prime is 20005423051. The next prime is 20005423093. The reversal of 20005423055 is 55032450002.

It is not a de Polignac number, because 20005423055 - 2² = 20005423051 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 (20005423051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72209 + ... + 212661.

It is an arithmetic number, because the mean of its divisors is an integer number (1528279974).

Almost surely, 2^20005423055 is an apocalyptic number.

20005423055 is a deficient number, since it is larger than the sum of its proper divisors (4447056529).

20005423055 is a wasteful number, since it uses less digits than its factorization.

20005423055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140986.

The product of its (nonzero) digits is 6000, while the sum is 26.

Adding to 20005423055 its reverse (55032450002), we get a palindrome (75037873057).

The spelling of 20005423055 in words is "twenty billion, five million, four hundred twenty-three thousand, fifty-five".