20413504344531 has 16 divisors (see below), whose sum is σ = 27289623085056. Its totient is φ = 13573195689216.

The previous prime is 20413504344521. The next prime is 20413504344533. The reversal of 20413504344531 is 13544340531402.

It is not a de Polignac number, because 20413504344531 - 2⁷ = 20413504344403 is a prime.

It is a super-2 number, since 2×20413504344531² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20413504344531.

It is not an unprimeable number, because it can be changed into a prime (20413504344533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67851171 + ... + 68151363.

It is an arithmetic number, because the mean of its divisors is an integer number (1705601442816).

Almost surely, 2^{20413504344531} is an apocalyptic number.

20413504344531 is a deficient number, since it is larger than the sum of its proper divisors (6876118740525).

20413504344531 is a wasteful number, since it uses less digits than its factorization.

20413504344531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359762.

The product of its (nonzero) digits is 345600, while the sum is 39.

Adding to 20413504344531 its reverse (13544340531402), we get a palindrome (33957844875933).

The spelling of 20413504344531 in words is "twenty trillion, four hundred thirteen billion, five hundred four million, three hundred forty-four thousand, five hundred thirty-one".