20903696369 has 2 divisors, whose sum is σ = 20903696370. Its totient is φ = 20903696368.

The previous prime is 20903696357. The next prime is 20903696399. The reversal of 20903696369 is 96369630902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17242841344 + 3660855025 = 131312^2 + 60505^2 .

It is a cyclic number.

It is not a de Polignac number, because 20903696369 - 2⁸ = 20903696113 is a prime.

It is a super-2 number, since 2×20903696369² (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 20903696369.

It is not a weakly prime, because it can be changed into another prime (20903696309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10451848184 + 10451848185.

It is an arithmetic number, because the mean of its divisors is an integer number (10451848185).

Almost surely, 2^20903696369 is an apocalyptic number.

It is an amenable number.

20903696369 is a deficient number, since it is larger than the sum of its proper divisors (1).

20903696369 is an equidigital number, since it uses as much as digits as its factorization.

20903696369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2834352, while the sum is 53.

The spelling of 20903696369 in words is "twenty billion, nine hundred three million, six hundred ninety-six thousand, three hundred sixty-nine".