20523575105 has 8 divisors (see below), whose sum is σ = 26867225664. Its totient is φ = 14926236400.

The previous prime is 20523575101. The next prime is 20523575113. The reversal of 20523575105 is 50157532502.

It is a happy number.

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

It is not a de Polignac number, because 20523575105 - 2² = 20523575101 is a prime.

It is a super-2 number, since 2×20523575105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20523575101) 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, 186577901 + ... + 186578010.

It is an arithmetic number, because the mean of its divisors is an integer number (3358403208).

Almost surely, 2^20523575105 is an apocalyptic number.

It is an amenable number.

20523575105 is a deficient number, since it is larger than the sum of its proper divisors (6343650559).

20523575105 is a wasteful number, since it uses less digits than its factorization.

20523575105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373155927.

The product of its (nonzero) digits is 52500, while the sum is 35.

The spelling of 20523575105 in words is "twenty billion, five hundred twenty-three million, five hundred seventy-five thousand, one hundred five".