21849720107 has 2 divisors, whose sum is σ = 21849720108. Its totient is φ = 21849720106.

The previous prime is 21849720089. The next prime is 21849720157. The reversal of 21849720107 is 70102794812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21849720107 - 2¹⁰ = 21849719083 is a prime.

It is not a weakly prime, because it can be changed into another prime (21849720157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10924860053 + 10924860054.

It is an arithmetic number, because the mean of its divisors is an integer number (10924860054).

Almost surely, 2^21849720107 is an apocalyptic number.

21849720107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21849720107 is an equidigital number, since it uses as much as digits as its factorization.

21849720107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 41.

The spelling of 21849720107 in words is "twenty-one billion, eight hundred forty-nine million, seven hundred twenty thousand, one hundred seven".