20523189771 has 24 divisors (see below), whose sum is σ = 35047814880. Its totient is φ = 11323138176.

The previous prime is 20523189763. The next prime is 20523189773. The reversal of 20523189771 is 17798132502.

20523189771 is a `hidden beast` number, since 20 + 523 + 18 + 97 + 7 + 1 = 666.

It is not a de Polignac number, because 20523189771 - 2³ = 20523189763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20523189773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5614810 + ... + 5618463.

It is an arithmetic number, because the mean of its divisors is an integer number (1460325620).

Almost surely, 2^20523189771 is an apocalyptic number.

20523189771 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20523189771 is a deficient number, since it is larger than the sum of its proper divisors (14524625109).

20523189771 is a wasteful number, since it uses less digits than its factorization.

20523189771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11233315 (or 11233312 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 20523189771 in words is "twenty billion, five hundred twenty-three million, one hundred eighty-nine thousand, seven hundred seventy-one".