20730209807 has 2 divisors, whose sum is σ = 20730209808. Its totient is φ = 20730209806.

The previous prime is 20730209777. The next prime is 20730209827. The reversal of 20730209807 is 70890203702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20730209807 - 2¹⁴ = 20730193423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20730209827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10365104903 + 10365104904.

It is an arithmetic number, because the mean of its divisors is an integer number (10365104904).

Almost surely, 2^20730209807 is an apocalyptic number.

20730209807 is a deficient number, since it is larger than the sum of its proper divisors (1).

20730209807 is an equidigital number, since it uses as much as digits as its factorization.

20730209807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 38.

The spelling of 20730209807 in words is "twenty billion, seven hundred thirty million, two hundred nine thousand, eight hundred seven".