20543445375 has 16 divisors (see below), whose sum is σ = 34184293728. Its totient is φ = 10956504000.

The previous prime is 20543445367. The next prime is 20543445389. The reversal of 20543445375 is 57354434502.

It is not a de Polignac number, because 20543445375 - 2³ = 20543445367 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

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 15 ways as a sum of consecutive naturals, for example, 27390886 + ... + 27391635.

It is an arithmetic number, because the mean of its divisors is an integer number (2136518358).

Almost surely, 2^20543445375 is an apocalyptic number.

20543445375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20543445375 is a deficient number, since it is larger than the sum of its proper divisors (13640848353).

20543445375 is an equidigital number, since it uses as much as digits as its factorization.

20543445375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54782539 (or 54782529 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 42.

Adding to 20543445375 its reverse (57354434502), we get a palindrome (77897879877).

The spelling of 20543445375 in words is "twenty billion, five hundred forty-three million, four hundred forty-five thousand, three hundred seventy-five".