55352120020 has 24 divisors (see below), whose sum is σ = 123077067624. Its totient is φ = 20838445056.

The previous prime is 55352120017. The next prime is 55352120027. The reversal of 55352120020 is 2002125355.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1595842704 + 53756277316 = 39948^2 + 231854^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55352120027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81399837 + ... + 81400516.

It is an arithmetic number, because the mean of its divisors is an integer number (5128211151).

Almost surely, 2^55352120020 is an apocalyptic number.

It is an amenable number.

55352120020 is an abundant number, since it is smaller than the sum of its proper divisors (67724947604).

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

55352120020 is a wasteful number, since it uses less digits than its factorization.

55352120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162800379 (or 162800377 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

Adding to 55352120020 its reverse (2002125355), we get a palindrome (57354245375).

The spelling of 55352120020 in words is "fifty-five billion, three hundred fifty-two million, one hundred twenty thousand, twenty".