20552143105 has 16 divisors (see below), whose sum is σ = 27060823440. Its totient is φ = 14890606848.

The previous prime is 20552143093. The next prime is 20552143121. The reversal of 20552143105 is 50134125502.

It can be written as a sum of positive squares in 8 ways, for example, as 1441569024 + 19110574081 = 37968^2 + 138241^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20552143105 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2979450 + ... + 2986339.

It is an arithmetic number, because the mean of its divisors is an integer number (1691301465).

Almost surely, 2^20552143105 is an apocalyptic number.

It is an amenable number.

20552143105 is a deficient number, since it is larger than the sum of its proper divisors (6508680335).

20552143105 is a wasteful number, since it uses less digits than its factorization.

20552143105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5965860.

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 20552143105 its reverse (50134125502), we get a palindrome (70686268607).

The spelling of 20552143105 in words is "twenty billion, five hundred fifty-two million, one hundred forty-three thousand, one hundred five".