20235440543 has 8 divisors (see below), whose sum is σ = 20494236480. Its totient is φ = 19976711040.

The previous prime is 20235440539. The next prime is 20235440573. The reversal of 20235440543 is 34504453202.

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

It is not a de Polignac number, because 20235440543 - 2² = 20235440539 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 (20235440573) 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, 959771 + ... + 980627.

It is an arithmetic number, because the mean of its divisors is an integer number (2561779560).

Almost surely, 2^20235440543 is an apocalyptic number.

20235440543 is a deficient number, since it is larger than the sum of its proper divisors (258795937).

20235440543 is a wasteful number, since it uses less digits than its factorization.

20235440543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33217.

The product of its (nonzero) digits is 57600, while the sum is 32.

Adding to 20235440543 its reverse (34504453202), we get a palindrome (54739893745).

The spelling of 20235440543 in words is "twenty billion, two hundred thirty-five million, four hundred forty thousand, five hundred forty-three".