20552512511 has 8 divisors (see below), whose sum is σ = 20687358384. Its totient is φ = 20417716800.

The previous prime is 20552512493. The next prime is 20552512517. The reversal of 20552512511 is 11521525502.

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 20552512511 - 2⁶ = 20552512447 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 (20552512517) 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, 1172411 + ... + 1189811.

It is an arithmetic number, because the mean of its divisors is an integer number (2585919798).

Almost surely, 2^20552512511 is an apocalyptic number.

20552512511 is a deficient number, since it is larger than the sum of its proper divisors (134845873).

20552512511 is a wasteful number, since it uses less digits than its factorization.

20552512511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25081.

The product of its (nonzero) digits is 5000, while the sum is 29.

The spelling of 20552512511 in words is "twenty billion, five hundred fifty-two million, five hundred twelve thousand, five hundred eleven".