20124055405 has 16 divisors (see below), whose sum is σ = 26451094320. Its totient is φ = 14629737472.

The previous prime is 20124055363. The next prime is 20124055411. The reversal of 20124055405 is 50455042102.

It can be written as a sum of positive squares in 8 ways, for example, as 1965414889 + 18158640516 = 44333^2 + 134754^2 .

It is a cyclic number.

It is not a de Polignac number, because 20124055405 - 2⁷ = 20124055277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4079494 + ... + 4084423.

It is an arithmetic number, because the mean of its divisors is an integer number (1653193395).

Almost surely, 2^20124055405 is an apocalyptic number.

It is an amenable number.

20124055405 is a deficient number, since it is larger than the sum of its proper divisors (6327038915).

20124055405 is a wasteful number, since it uses less digits than its factorization.

20124055405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8163968.

The product of its (nonzero) digits is 8000, while the sum is 28.

Adding to 20124055405 its reverse (50455042102), we get a palindrome (70579097507).

The spelling of 20124055405 in words is "twenty billion, one hundred twenty-four million, fifty-five thousand, four hundred five".