20400410369 has 2 divisors, whose sum is σ = 20400410370. Its totient is φ = 20400410368.

The previous prime is 20400410347. The next prime is 20400410417. The reversal of 20400410369 is 96301400402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18580961344 + 1819449025 = 136312^2 + 42655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20400410369 is a prime.

It is a super-2 number, since 2×20400410369² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20400410309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200205184 + 10200205185.

It is an arithmetic number, because the mean of its divisors is an integer number (10200205185).

Almost surely, 2^20400410369 is an apocalyptic number.

It is an amenable number.

20400410369 is a deficient number, since it is larger than the sum of its proper divisors (1).

20400410369 is an equidigital number, since it uses as much as digits as its factorization.

20400410369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 20400410369 in words is "twenty billion, four hundred million, four hundred ten thousand, three hundred sixty-nine".