20523545141 has 4 divisors (see below), whose sum is σ = 22389321984. Its totient is φ = 18657768300.

The previous prime is 20523545089. The next prime is 20523545149. The reversal of 20523545141 is 14154532502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20523545141 - 2²² = 20519350837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20523545098 and 20523545107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20523545149) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 932888405 + ... + 932888426.

It is an arithmetic number, because the mean of its divisors is an integer number (5597330496).

Almost surely, 2^20523545141 is an apocalyptic number.

It is an amenable number.

20523545141 is a deficient number, since it is larger than the sum of its proper divisors (1865776843).

20523545141 is a wasteful number, since it uses less digits than its factorization.

20523545141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865776842.

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 20523545141 in words is "twenty billion, five hundred twenty-three million, five hundred forty-five thousand, one hundred forty-one".