20055550505 has 16 divisors (see below), whose sum is σ = 25491294864. Its totient is φ = 15095347200.

The previous prime is 20055550483. The next prime is 20055550523. The reversal of 20055550505 is 50505555002.

It can be written as a sum of positive squares in 8 ways, for example, as 519338521 + 19536211984 = 22789^2 + 139772^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20055550505 is a prime.

It is a Duffinian number.

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, 211055 + ... + 290955.

It is an arithmetic number, because the mean of its divisors is an integer number (1593205929).

Almost surely, 2^20055550505 is an apocalyptic number.

It is an amenable number.

20055550505 is a deficient number, since it is larger than the sum of its proper divisors (5435744359).

20055550505 is a wasteful number, since it uses less digits than its factorization.

20055550505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82876.

The product of its (nonzero) digits is 31250, while the sum is 32.

The spelling of 20055550505 in words is "twenty billion, fifty-five million, five hundred fifty thousand, five hundred five".