20551130424 has 48 divisors (see below), whose sum is σ = 60719251320. Its totient is φ = 6227615040.

The previous prime is 20551130419. The next prime is 20551130437. The reversal of 20551130424 is 42403115502.

20551130424 is a `hidden beast` number, since 205 + 5 + 1 + 1 + 30 + 424 = 666.

It is a congruent number.

It is an unprimeable number.

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, 12973407 + ... + 12974990.

Almost surely, 2^20551130424 is an apocalyptic number.

20551130424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20551130424 is an abundant number, since it is smaller than the sum of its proper divisors (40168120896).

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

20551130424 is a wasteful number, since it uses less digits than its factorization.

20551130424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25948420 (or 25948413 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 20551130424 its reverse (42403115502), we get a palindrome (62954245926).

It can be divided in two parts, 20551 and 130424, that added together give a triangular number (150975 = T₅₄₉).

The spelling of 20551130424 in words is "twenty billion, five hundred fifty-one million, one hundred thirty thousand, four hundred twenty-four".