20387174099 has 2 divisors, whose sum is σ = 20387174100. Its totient is φ = 20387174098.

The previous prime is 20387174053. The next prime is 20387174111. The reversal of 20387174099 is 99047178302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20387174099 is a prime.

It is not a weakly prime, because it can be changed into another prime (20387174039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10193587049 + 10193587050.

It is an arithmetic number, because the mean of its divisors is an integer number (10193587050).

Almost surely, 2^20387174099 is an apocalyptic number.

20387174099 is a deficient number, since it is larger than the sum of its proper divisors (1).

20387174099 is an equidigital number, since it uses as much as digits as its factorization.

20387174099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 20387174099 in words is "twenty billion, three hundred eighty-seven million, one hundred seventy-four thousand, ninety-nine".