55203203020 has 72 divisors (see below), whose sum is σ = 138498320016. Its totient is φ = 18415264896.

The previous prime is 55203202993. The next prime is 55203203047. The reversal of 55203203020 is 2030230255.

It is an interprime number because it is at equal distance from previous prime (55203202993) and next prime (55203203047).

It is a junction number, because it is equal to n+sod(n) for n = 55203202982 and 55203203000.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 724954 + ... + 797473.

It is an arithmetic number, because the mean of its divisors is an integer number (1923587778).

Almost surely, 2^55203203020 is an apocalyptic number.

It is an amenable number.

55203203020 is an abundant number, since it is smaller than the sum of its proper divisors (83295116996).

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

55203203020 is a wasteful number, since it uses less digits than its factorization.

55203203020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522487 (or 1522478 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 22.

Adding to 55203203020 its reverse (2030230255), we get a palindrome (57233433275).

The spelling of 55203203020 in words is "fifty-five billion, two hundred three million, two hundred three thousand, twenty".