20124520505 has 8 divisors (see below), whose sum is σ = 24154881792. Its totient is φ = 16095978288.

The previous prime is 20124520487. The next prime is 20124520613. The reversal of 20124520505 is 50502542102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20124520505 - 2⁸ = 20124520249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430307 + ... + 474776.

It is an arithmetic number, because the mean of its divisors is an integer number (3019360224).

Almost surely, 2^20124520505 is an apocalyptic number.

It is an amenable number.

20124520505 is a deficient number, since it is larger than the sum of its proper divisors (4030361287).

20124520505 is an equidigital number, since it uses as much as digits as its factorization.

20124520505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909535.

The product of its (nonzero) digits is 4000, while the sum is 26.

The spelling of 20124520505 in words is "twenty billion, one hundred twenty-four million, five hundred twenty thousand, five hundred five".