20315641400505 has 24 divisors (see below), whose sum is σ = 38415031012800. Its totient is φ = 9850007951520.

The previous prime is 20315641400501. The next prime is 20315641400507. The reversal of 20315641400505 is 50500414651302.

20315641400505 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 5 + 6 + 4 + 140 + 0 + 505 = 666.

It is not a de Polignac number, because 20315641400505 - 2² = 20315641400501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20315641400505.

It is not an unprimeable number, because it can be changed into a prime (20315641400501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20520849405 + ... + 20520850394.

It is an arithmetic number, because the mean of its divisors is an integer number (1600626292200).

Almost surely, 2^{20315641400505} is an apocalyptic number.

It is an amenable number.

20315641400505 is a deficient number, since it is larger than the sum of its proper divisors (18099389612295).

20315641400505 is a wasteful number, since it uses less digits than its factorization.

20315641400505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41041699821 (or 41041699818 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 20315641400505 in words is "twenty trillion, three hundred fifteen billion, six hundred forty-one million, four hundred thousand, five hundred five".