20554024243 has 4 divisors (see below), whose sum is σ = 20555224048. Its totient is φ = 20552824440.

The previous prime is 20554024219. The next prime is 20554024289. The reversal of 20554024243 is 34242045502.

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-20554024243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20554024213) 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, 573828 + ... + 608593.

It is an arithmetic number, because the mean of its divisors is an integer number (5138806012).

Almost surely, 2^20554024243 is an apocalyptic number.

20554024243 is a deficient number, since it is larger than the sum of its proper divisors (1199805).

20554024243 is a wasteful number, since it uses less digits than its factorization.

20554024243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199804.

The product of its (nonzero) digits is 38400, while the sum is 31.

Adding to 20554024243 its reverse (34242045502), we get a palindrome (54796069745).

The spelling of 20554024243 in words is "twenty billion, five hundred fifty-four million, twenty-four thousand, two hundred forty-three".