20413515604651 has 4 divisors (see below), whose sum is σ = 21983786035792. Its totient is φ = 18843245173512.

The previous prime is 20413515604649. The next prime is 20413515604709. The reversal of 20413515604651 is 15640651531402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20413515604651 - 2¹ = 20413515604649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20413515604598 and 20413515604607.

It is not an unprimeable number, because it can be changed into a prime (20413515604051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 785135215551 + ... + 785135215576.

It is an arithmetic number, because the mean of its divisors is an integer number (5495946508948).

Almost surely, 2^{20413515604651} is an apocalyptic number.

20413515604651 is a deficient number, since it is larger than the sum of its proper divisors (1570270431141).

20413515604651 is a wasteful number, since it uses less digits than its factorization.

20413515604651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570270431140.

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 20413515604651 in words is "twenty trillion, four hundred thirteen billion, five hundred fifteen million, six hundred four thousand, six hundred fifty-one".