20087399149 has 2 divisors, whose sum is σ = 20087399150. Its totient is φ = 20087399148.

The previous prime is 20087399099. The next prime is 20087399159. The reversal of 20087399149 is 94199378002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18281744100 + 1805655049 = 135210^2 + 42493^2 .

It is a cyclic number.

It is not a de Polignac number, because 20087399149 - 2¹⁷ = 20087268077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20087399096 and 20087399105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20087399159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10043699574 + 10043699575.

It is an arithmetic number, because the mean of its divisors is an integer number (10043699575).

Almost surely, 2^20087399149 is an apocalyptic number.

It is an amenable number.

20087399149 is a deficient number, since it is larger than the sum of its proper divisors (1).

20087399149 is an equidigital number, since it uses as much as digits as its factorization.

20087399149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 52.

The spelling of 20087399149 in words is "twenty billion, eighty-seven million, three hundred ninety-nine thousand, one hundred forty-nine".