20135550505 has 16 divisors (see below), whose sum is σ = 27872553600. Its totient is φ = 13678192512.

The previous prime is 20135550493. The next prime is 20135550509. The reversal of 20135550505 is 50505553102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20135550505 - 2⁵ = 20135550473 is a prime.

It is a super-3 number, since 3×20135550505³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20135550509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2684580 + ... + 2692069.

It is an arithmetic number, because the mean of its divisors is an integer number (1742034600).

Almost surely, 2^20135550505 is an apocalyptic number.

It is an amenable number.

20135550505 is a deficient number, since it is larger than the sum of its proper divisors (7737003095).

20135550505 is a wasteful number, since it uses less digits than its factorization.

20135550505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5376768.

The product of its (nonzero) digits is 18750, while the sum is 31.

The spelling of 20135550505 in words is "twenty billion, one hundred thirty-five million, five hundred fifty thousand, five hundred five".