20523354511 has 8 divisors (see below), whose sum is σ = 22518532944. Its totient is φ = 18549745920.

The previous prime is 20523354493. The next prime is 20523354541. The reversal of 20523354511 is 11545332502.

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 20523354511 - 2⁹ = 20523353999 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 (20523354541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5390466 + ... + 5394271.

It is an arithmetic number, because the mean of its divisors is an integer number (2814816618).

Almost surely, 2^20523354511 is an apocalyptic number.

20523354511 is a deficient number, since it is larger than the sum of its proper divisors (1995178433).

20523354511 is a wasteful number, since it uses less digits than its factorization.

20523354511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10784921.

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 20523354511 in words is "twenty billion, five hundred twenty-three million, three hundred fifty-four thousand, five hundred eleven".