20787934099 has 2 divisors, whose sum is σ = 20787934100. Its totient is φ = 20787934098.

The previous prime is 20787934081. The next prime is 20787934117. The reversal of 20787934099 is 99043978702.

It is a balanced prime because it is at equal distance from previous prime (20787934081) and next prime (20787934117).

It is a cyclic number.

It is not a de Polignac number, because 20787934099 - 2¹⁷ = 20787803027 is a prime.

It is not a weakly prime, because it can be changed into another prime (20787934009) 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, 10393967049 + 10393967050.

It is an arithmetic number, because the mean of its divisors is an integer number (10393967050).

Almost surely, 2^20787934099 is an apocalyptic number.

20787934099 is a deficient number, since it is larger than the sum of its proper divisors (1).

20787934099 is an equidigital number, since it uses as much as digits as its factorization.

20787934099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6858432, while the sum is 58.

The spelling of 20787934099 in words is "twenty billion, seven hundred eighty-seven million, nine hundred thirty-four thousand, ninety-nine".