20624406543 has 56 divisors (see below), whose sum is σ = 33473186208. Its totient is φ = 12626373312.

The previous prime is 20624406527. The next prime is 20624406581. The reversal of 20624406543 is 34560442602.

20624406543 is a `hidden beast` number, since 20 + 624 + 4 + 0 + 6 + 5 + 4 + 3 = 666.

It is a Cunningham number, because it is equal to 143612²-1.

It is not a de Polignac number, because 20624406543 - 2⁴ = 20624406527 is a prime.

It is a super-2 number, since 2×20624406543² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20624406498 and 20624406507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20624406643) 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 55 ways as a sum of consecutive naturals, for example, 1861446 + ... + 1872492.

It is an arithmetic number, because the mean of its divisors is an integer number (597735468).

Almost surely, 2^20624406543 is an apocalyptic number.

20624406543 is a deficient number, since it is larger than the sum of its proper divisors (12848779665).

20624406543 is a wasteful number, since it uses less digits than its factorization.

20624406543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11275 (or 11260 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

The spelling of 20624406543 in words is "twenty billion, six hundred twenty-four million, four hundred six thousand, five hundred forty-three".