20106724387 has 2 divisors, whose sum is σ = 20106724388. Its totient is φ = 20106724386.

The previous prime is 20106724343. The next prime is 20106724397. The reversal of 20106724387 is 78342760102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20106724387 - 2⁷ = 20106724259 is a prime.

It is not a weakly prime, because it can be changed into another prime (20106724397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10053362193 + 10053362194.

It is an arithmetic number, because the mean of its divisors is an integer number (10053362194).

Almost surely, 2^20106724387 is an apocalyptic number.

20106724387 is a deficient number, since it is larger than the sum of its proper divisors (1).

20106724387 is an equidigital number, since it uses as much as digits as its factorization.

20106724387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 40.

The spelling of 20106724387 in words is "twenty billion, one hundred six million, seven hundred twenty-four thousand, three hundred eighty-seven".