20523139101 has 8 divisors (see below), whose sum is σ = 30404650560. Its totient is φ = 13682092716.

The previous prime is 20523139099. The next prime is 20523139121. The reversal of 20523139101 is 10193132502.

20523139101 is a `hidden beast` number, since 2 + 0 + 523 + 1 + 39 + 101 = 666.

It is not a de Polignac number, because 20523139101 - 2¹ = 20523139099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 760116263 = 20523139101 / (2 + 0 + 5 + 2 + 3 + 1 + 3 + 9 + 1 + 0 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20523139121) 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, 380058105 + ... + 380058158.

It is an arithmetic number, because the mean of its divisors is an integer number (3800581320).

Almost surely, 2^20523139101 is an apocalyptic number.

It is an amenable number.

20523139101 is a deficient number, since it is larger than the sum of its proper divisors (9881511459).

20523139101 is an equidigital number, since it uses as much as digits as its factorization.

20523139101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760116272 (or 760116266 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The spelling of 20523139101 in words is "twenty billion, five hundred twenty-three million, one hundred thirty-nine thousand, one hundred one".