20363387409 has 6 divisors (see below), whose sum is σ = 29413781826. Its totient is φ = 13575591600.

The previous prime is 20363387399. The next prime is 20363387419. The reversal of 20363387409 is 90478336302.

20363387409 is a `hidden beast` number, since 2 + 0 + 3 + 633 + 8 + 7 + 4 + 0 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (20363387399) and next prime (20363387419).

It can be written as a sum of positive squares in only one way, i.e., 16027560000 + 4335827409 = 126600^2 + 65847^2 .

It is not a de Polignac number, because 20363387409 - 2⁸ = 20363387153 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20363387419) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1131299292 + ... + 1131299309.

It is an arithmetic number, because the mean of its divisors is an integer number (4902296971).

Almost surely, 2^20363387409 is an apocalyptic number.

It is an amenable number.

20363387409 is a deficient number, since it is larger than the sum of its proper divisors (9050394417).

20363387409 is a wasteful number, since it uses less digits than its factorization.

20363387409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262598607 (or 2262598604 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The spelling of 20363387409 in words is "twenty billion, three hundred sixty-three million, three hundred eighty-seven thousand, four hundred nine".