20554240240 has 20 divisors (see below), whose sum is σ = 47788608744. Its totient is φ = 8221696064.

The previous prime is 20554240183. The next prime is 20554240247. The reversal of 20554240240 is 4204245502.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 20554240199 and 20554240208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20554240247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128463922 + ... + 128464081.

Almost surely, 2^20554240240 is an apocalyptic number.

20554240240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20554240240 is an abundant number, since it is smaller than the sum of its proper divisors (27234368504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20554240240 is a wasteful number, since it uses less digits than its factorization.

20554240240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256928016 (or 256928010 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 28.

Adding to 20554240240 its reverse (4204245502), we get a palindrome (24758485742).

The spelling of 20554240240 in words is "twenty billion, five hundred fifty-four million, two hundred forty thousand, two hundred forty".