20531054424 has 32 divisors (see below), whose sum is σ = 51331849920. Its totient is φ = 6843122976.

The previous prime is 20531054419. The next prime is 20531054461. The reversal of 20531054424 is 42445013502.

It is a super-2 number, since 2×20531054424² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20531054391 and 20531054400.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 349119 + ... + 403665.

It is an arithmetic number, because the mean of its divisors is an integer number (1604120310).

Almost surely, 2^20531054424 is an apocalyptic number.

20531054424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20531054424 is an abundant number, since it is smaller than the sum of its proper divisors (30800795496).

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

20531054424 is a wasteful number, since it uses less digits than its factorization.

20531054424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70239 (or 70235 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 20531054424 its reverse (42445013502), we get a palindrome (62976067926).

The spelling of 20531054424 in words is "twenty billion, five hundred thirty-one million, fifty-four thousand, four hundred twenty-four".