20413505331663 has 32 divisors (see below), whose sum is σ = 27979669724160. Its totient is φ = 13230522685440.

The previous prime is 20413505331649. The next prime is 20413505331677. The reversal of 20413505331663 is 36613350531402.

It is an interprime number because it is at equal distance from previous prime (20413505331649) and next prime (20413505331677).

It is not a de Polignac number, because 20413505331663 - 2¹⁸ = 20413505069519 is a prime.

It is a super-2 number, since 2×20413505331663² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20413505331613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155849706 + ... + 155980632.

It is an arithmetic number, because the mean of its divisors is an integer number (874364678880).

Almost surely, 2^{20413505331663} is an apocalyptic number.

20413505331663 is a deficient number, since it is larger than the sum of its proper divisors (7566164392497).

20413505331663 is a wasteful number, since it uses less digits than its factorization.

20413505331663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135407.

The product of its (nonzero) digits is 583200, while the sum is 42.

The spelling of 20413505331663 in words is "twenty trillion, four hundred thirteen billion, five hundred five million, three hundred thirty-one thousand, six hundred sixty-three".