20002400009 has 2 divisors, whose sum is σ = 20002400010. Its totient is φ = 20002400008.

The previous prime is 20002399951. The next prime is 20002400021. The reversal of 20002400009 is 90000420002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19978974409 + 23425600 = 141347^2 + 4840^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002400009 - 2¹² = 20002395913 is a prime.

It is a super-2 number, since 2×20002400009² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20002400009.

It is not a weakly prime, because it can be changed into another prime (20002400029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001200004 + 10001200005.

It is an arithmetic number, because the mean of its divisors is an integer number (10001200005).

Almost surely, 2^20002400009 is an apocalyptic number.

It is an amenable number.

20002400009 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002400009 is an equidigital number, since it uses as much as digits as its factorization.

20002400009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The spelling of 20002400009 in words is "twenty billion, two million, four hundred thousand, nine".