20025514543 has 4 divisors (see below), whose sum is σ = 20171686320. Its totient is φ = 19879342768.

The previous prime is 20025514517. The next prime is 20025514549. The reversal of 20025514543 is 34541552002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20025514543 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 (20025514549) 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, 73085683 + ... + 73085956.

It is an arithmetic number, because the mean of its divisors is an integer number (5042921580).

Almost surely, 2^20025514543 is an apocalyptic number.

20025514543 is a deficient number, since it is larger than the sum of its proper divisors (146171777).

20025514543 is a wasteful number, since it uses less digits than its factorization.

20025514543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146171776.

The product of its (nonzero) digits is 24000, while the sum is 31.

The spelling of 20025514543 in words is "twenty billion, twenty-five million, five hundred fourteen thousand, five hundred forty-three".