20606613025123 has 4 divisors (see below), whose sum is σ = 20614671929920. Its totient is φ = 20598554120328.

The previous prime is 20606613025039. The next prime is 20606613025133. The reversal of 20606613025123 is 32152031660602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20606613025123 - 2⁹ = 20606613024611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20606613025133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4029448563 + ... + 4029453676.

It is an arithmetic number, because the mean of its divisors is an integer number (5153667982480).

Almost surely, 2^{20606613025123} is an apocalyptic number.

20606613025123 is a deficient number, since it is larger than the sum of its proper divisors (8058904797).

20606613025123 is an equidigital number, since it uses as much as digits as its factorization.

20606613025123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8058904796.

The product of its (nonzero) digits is 77760, while the sum is 37.

Adding to 20606613025123 its reverse (32152031660602), we get a palindrome (52758644685725).

The spelling of 20606613025123 in words is "twenty trillion, six hundred six billion, six hundred thirteen million, twenty-five thousand, one hundred twenty-three".