20555435003 has 4 divisors (see below), whose sum is σ = 20573838480. Its totient is φ = 20537031528.

The previous prime is 20555434951. The next prime is 20555435011. The reversal of 20555435003 is 30053455502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20555435003 - 2¹⁶ = 20555369467 is a prime.

It is a super-2 number, since 2×20555435003² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20555435903) 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 3 ways as a sum of consecutive naturals, for example, 9200063 + ... + 9202296.

It is an arithmetic number, because the mean of its divisors is an integer number (5143459620).

Almost surely, 2^20555435003 is an apocalyptic number.

20555435003 is a deficient number, since it is larger than the sum of its proper divisors (18403477).

20555435003 is a wasteful number, since it uses less digits than its factorization.

20555435003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18403476.

The product of its (nonzero) digits is 45000, while the sum is 32.

The spelling of 20555435003 in words is "twenty billion, five hundred fifty-five million, four hundred thirty-five thousand, three".