21412520413469 has 2 divisors, whose sum is σ = 21412520413470. Its totient is φ = 21412520413468.

The previous prime is 21412520413463. The next prime is 21412520413489. The reversal of 21412520413469 is 96431402521412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14988008959225 + 6424511454244 = 3871435^2 + 2534662^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21412520413469 is a prime.

It is a super-2 number, since 2×21412520413469² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21412520413463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10706260206734 + 10706260206735.

It is an arithmetic number, because the mean of its divisors is an integer number (10706260206735).

Almost surely, 2^{21412520413469} is an apocalyptic number.

It is an amenable number.

21412520413469 is a deficient number, since it is larger than the sum of its proper divisors (1).

21412520413469 is an equidigital number, since it uses as much as digits as its factorization.

21412520413469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 21412520413469 in words is "twenty-one trillion, four hundred twelve billion, five hundred twenty million, four hundred thirteen thousand, four hundred sixty-nine".