20523425143 has 4 divisors (see below), whose sum is σ = 22102150168. Its totient is φ = 18944700120.

The previous prime is 20523425141. The next prime is 20523425207. The reversal of 20523425143 is 34152432502.

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 20523425143 - 2¹ = 20523425141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20523425141) 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, 789362493 + ... + 789362518.

It is an arithmetic number, because the mean of its divisors is an integer number (5525537542).

Almost surely, 2^20523425143 is an apocalyptic number.

20523425143 is a deficient number, since it is larger than the sum of its proper divisors (1578725025).

20523425143 is a wasteful number, since it uses less digits than its factorization.

20523425143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578725024.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 20523425143 its reverse (34152432502), we get a palindrome (54675857645).

The spelling of 20523425143 in words is "twenty billion, five hundred twenty-three million, four hundred twenty-five thousand, one hundred forty-three".