20520355425423 has 8 divisors (see below), whose sum is σ = 31269113029248. Its totient is φ = 11725917385944.

The previous prime is 20520355425397. The next prime is 20520355425461. The reversal of 20520355425423 is 32452455302502.

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

It is not a de Polignac number, because 20520355425423 - 2²⁵ = 20520321870991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20520355423423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488579891061 + ... + 488579891102.

It is an arithmetic number, because the mean of its divisors is an integer number (3908639128656).

Almost surely, 2^{20520355425423} is an apocalyptic number.

20520355425423 is a deficient number, since it is larger than the sum of its proper divisors (10748757603825).

20520355425423 is an equidigital number, since it uses as much as digits as its factorization.

20520355425423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977159782173.

The product of its (nonzero) digits is 1440000, while the sum is 42.

The spelling of 20520355425423 in words is "twenty trillion, five hundred twenty billion, three hundred fifty-five million, four hundred twenty-five thousand, four hundred twenty-three".