20502061235311 has 4 divisors (see below), whose sum is σ = 20732421474000. Its totient is φ = 20271700996624.

The previous prime is 20502061235281. The next prime is 20502061235371. The reversal of 20502061235311 is 11353216020502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20502061235311 - 2¹⁵ = 20502061202543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20502061235371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115180119211 + ... + 115180119388.

It is an arithmetic number, because the mean of its divisors is an integer number (5183105368500).

Almost surely, 2^{20502061235311} is an apocalyptic number.

20502061235311 is a deficient number, since it is larger than the sum of its proper divisors (230360238689).

20502061235311 is an equidigital number, since it uses as much as digits as its factorization.

20502061235311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230360238688.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 20502061235311 its reverse (11353216020502), we get a palindrome (31855277255813).

The spelling of 20502061235311 in words is "twenty trillion, five hundred two billion, sixty-one million, two hundred thirty-five thousand, three hundred eleven".