20555203537 has 16 divisors (see below), whose sum is σ = 22867220160. Its totient is φ = 18317707200.

The previous prime is 20555203519. The next prime is 20555203553. The reversal of 20555203537 is 73530255502.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20555203537 is a prime.

It is a super-3 number, since 3×20555203537³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20555203496 and 20555203505.

It is not an unprimeable number, because it can be changed into a prime (20555203037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 667639 + ... + 697747.

It is an arithmetic number, because the mean of its divisors is an integer number (1429201260).

Almost surely, 2^20555203537 is an apocalyptic number.

It is an amenable number.

20555203537 is a deficient number, since it is larger than the sum of its proper divisors (2312016623).

20555203537 is a wasteful number, since it uses less digits than its factorization.

20555203537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31344.

The product of its (nonzero) digits is 157500, while the sum is 37.

The spelling of 20555203537 in words is "twenty billion, five hundred fifty-five million, two hundred three thousand, five hundred thirty-seven".