20412798709 has 2 divisors, whose sum is σ = 20412798710. Its totient is φ = 20412798708.

The previous prime is 20412798691. The next prime is 20412798727. The reversal of 20412798709 is 90789721402.

It is a balanced prime because it is at equal distance from previous prime (20412798691) and next prime (20412798727).

It can be written as a sum of positive squares in only one way, i.e., 11647158084 + 8765640625 = 107922^2 + 93625^2 .

It is a cyclic number.

It is not a de Polignac number, because 20412798709 - 2⁵ = 20412798677 is a prime.

It is a super-2 number, since 2×20412798709² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20412798209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206399354 + 10206399355.

It is an arithmetic number, because the mean of its divisors is an integer number (10206399355).

Almost surely, 2^20412798709 is an apocalyptic number.

It is an amenable number.

20412798709 is a deficient number, since it is larger than the sum of its proper divisors (1).

20412798709 is an equidigital number, since it uses as much as digits as its factorization.

20412798709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 20412798709 in words is "twenty billion, four hundred twelve million, seven hundred ninety-eight thousand, seven hundred nine".