20523139099 has 2 divisors, whose sum is σ = 20523139100. Its totient is φ = 20523139098.

The previous prime is 20523139069. The next prime is 20523139121. The reversal of 20523139099 is 99093132502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20523139099 - 2¹³ = 20523130907 is a prime.

It is not a weakly prime, because it can be changed into another prime (20523139019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10261569549 + 10261569550.

It is an arithmetic number, because the mean of its divisors is an integer number (10261569550).

Almost surely, 2^20523139099 is an apocalyptic number.

20523139099 is a deficient number, since it is larger than the sum of its proper divisors (1).

20523139099 is an equidigital number, since it uses as much as digits as its factorization.

20523139099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131220, while the sum is 43.

The spelling of 20523139099 in words is "twenty billion, five hundred twenty-three million, one hundred thirty-nine thousand, ninety-nine".