20425554520423 has 8 divisors (see below), whose sum is σ = 22002363924800. Its totient is φ = 18849546959328.

The previous prime is 20425554520403. The next prime is 20425554520439. The reversal of 20425554520423 is 32402545552402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20425554520423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20425554520423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20425554520403) 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, 200407908 + ... + 200509801.

It is an arithmetic number, because the mean of its divisors is an integer number (2750295490600).

Almost surely, 2^{20425554520423} is an apocalyptic number.

20425554520423 is a deficient number, since it is larger than the sum of its proper divisors (1576809404377).

20425554520423 is a wasteful number, since it uses less digits than its factorization.

20425554520423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400921641.

The product of its (nonzero) digits is 1920000, while the sum is 43.

The spelling of 20425554520423 in words is "twenty trillion, four hundred twenty-five billion, five hundred fifty-four million, five hundred twenty thousand, four hundred twenty-three".