20413344440465 has 16 divisors (see below), whose sum is σ = 24519724185600. Its totient is φ = 16314869314752.

The previous prime is 20413344440453. The next prime is 20413344440501. The reversal of 20413344440465 is 56404444331402.

It is a cyclic number.

It is not a de Polignac number, because 20413344440465 - 2¹² = 20413344436369 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305267624 + ... + 305334486.

It is an arithmetic number, because the mean of its divisors is an integer number (1532482761600).

Almost surely, 2^{20413344440465} is an apocalyptic number.

It is an amenable number.

20413344440465 is a deficient number, since it is larger than the sum of its proper divisors (4106379745135).

20413344440465 is a wasteful number, since it uses less digits than its factorization.

20413344440465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125056.

The product of its (nonzero) digits is 2211840, while the sum is 44.

Adding to 20413344440465 its reverse (56404444331402), we get a palindrome (76817788771867).

The spelling of 20413344440465 in words is "twenty trillion, four hundred thirteen billion, three hundred forty-four million, four hundred forty thousand, four hundred sixty-five".