20413345456465 has 16 divisors (see below), whose sum is σ = 26384626650816. Its totient is φ = 15072011467200.

The previous prime is 20413345456453. The next prime is 20413345456477. The reversal of 20413345456465 is 56465454331402.

It is an interprime number because it is at equal distance from previous prime (20413345456453) and next prime (20413345456477).

It is not a de Polignac number, because 20413345456465 - 2⁹ = 20413345455953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25213251 + ... + 26010280.

It is an arithmetic number, because the mean of its divisors is an integer number (1649039165676).

Almost surely, 2^{20413345456465} is an apocalyptic number.

It is an amenable number.

20413345456465 is a deficient number, since it is larger than the sum of its proper divisors (5971281194351).

20413345456465 is a wasteful number, since it uses less digits than its factorization.

20413345456465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51229680.

The product of its (nonzero) digits is 20736000, while the sum is 52.

Adding to 20413345456465 its reverse (56465454331402), we get a palindrome (76878799787867).

The spelling of 20413345456465 in words is "twenty trillion, four hundred thirteen billion, three hundred forty-five million, four hundred fifty-six thousand, four hundred sixty-five".