20625143105 has 16 divisors (see below), whose sum is σ = 28292655360. Its totient is φ = 14139582912.

The previous prime is 20625143101. The next prime is 20625143141. The reversal of 20625143105 is 50134152602.

It is not a de Polignac number, because 20625143105 - 2² = 20625143101 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20625143101) 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 15 ways as a sum of consecutive naturals, for example, 83351 + ... + 219539.

It is an arithmetic number, because the mean of its divisors is an integer number (1768290960).

Almost surely, 2^20625143105 is an apocalyptic number.

It is an amenable number.

20625143105 is a deficient number, since it is larger than the sum of its proper divisors (7667512255).

20625143105 is a wasteful number, since it uses less digits than its factorization.

20625143105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140528.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 20625143105 its reverse (50134152602), we get a palindrome (70759295707).

The spelling of 20625143105 in words is "twenty billion, six hundred twenty-five million, one hundred forty-three thousand, one hundred five".