20523250543 has 4 divisors (see below), whose sum is σ = 21415565808. Its totient is φ = 19630935280.

The previous prime is 20523250541. The next prime is 20523250609. The reversal of 20523250543 is 34505232502.

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 20523250543 - 2¹ = 20523250541 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 (20523250541) 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, 446157598 + ... + 446157643.

It is an arithmetic number, because the mean of its divisors is an integer number (5353891452).

Almost surely, 2^20523250543 is an apocalyptic number.

20523250543 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20523250543 is a deficient number, since it is larger than the sum of its proper divisors (892315265).

20523250543 is an equidigital number, since it uses as much as digits as its factorization.

20523250543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892315264.

The product of its (nonzero) digits is 36000, while the sum is 31.

The spelling of 20523250543 in words is "twenty billion, five hundred twenty-three million, two hundred fifty thousand, five hundred forty-three".