20413515604655 has 16 divisors (see below), whose sum is σ = 25341292156320. Its totient is φ = 15767446918272.

The previous prime is 20413515604649. The next prime is 20413515604709. The reversal of 20413515604655 is 55640651531402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20413515604655 - 2¹⁶ = 20413515539119 is a prime.

It is a congruent 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, 9092912 + ... + 11113418.

It is an arithmetic number, because the mean of its divisors is an integer number (1583830759770).

Almost surely, 2^{20413515604655} is an apocalyptic number.

20413515604655 is a deficient number, since it is larger than the sum of its proper divisors (4927776551665).

20413515604655 is a wasteful number, since it uses less digits than its factorization.

20413515604655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090218.

The product of its (nonzero) digits is 2160000, while the sum is 47.

The spelling of 20413515604655 in words is "twenty trillion, four hundred thirteen billion, five hundred fifteen million, six hundred four thousand, six hundred fifty-five".