20523255311 has 8 divisors (see below), whose sum is σ = 22864104480. Its totient is φ = 18291282912.

The previous prime is 20523255307. The next prime is 20523255413. The reversal of 20523255311 is 11355232502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20523255311 - 2² = 20523255307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20523255911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27218795 + ... + 27219548.

It is an arithmetic number, because the mean of its divisors is an integer number (2858013060).

Almost surely, 2^20523255311 is an apocalyptic number.

20523255311 is a deficient number, since it is larger than the sum of its proper divisors (2340849169).

20523255311 is a wasteful number, since it uses less digits than its factorization.

20523255311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54438385.

The product of its (nonzero) digits is 9000, while the sum is 29.

Adding to 20523255311 its reverse (11355232502), we get a palindrome (31878487813).

The spelling of 20523255311 in words is "twenty billion, five hundred twenty-three million, two hundred fifty-five thousand, three hundred eleven".