20003020551 has 12 divisors (see below), whose sum is σ = 29963372712. Its totient is φ = 13335346872.

The previous prime is 20003020517. The next prime is 20003020567. The reversal of 20003020551 is 15502030002.

It is a happy number.

It is not a de Polignac number, because 20003020551 - 2¹⁰ = 20003019527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003020651) 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 11 ways as a sum of consecutive naturals, for example, 41158236 + ... + 41158721.

It is an arithmetic number, because the mean of its divisors is an integer number (2496947726).

Almost surely, 2^20003020551 is an apocalyptic number.

20003020551 is a deficient number, since it is larger than the sum of its proper divisors (9960352161).

20003020551 is an frugal number, since it uses more digits than its factorization.

20003020551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82316972 (or 82316960 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

Adding to 20003020551 its reverse (15502030002), we get a palindrome (35505050553).

The spelling of 20003020551 in words is "twenty billion, three million, twenty thousand, five hundred fifty-one".