20405134295695 has 32 divisors (see below), whose sum is σ = 24822339010560. Its totient is φ = 16101533185920.

The previous prime is 20405134295683. The next prime is 20405134295729. The reversal of 20405134295695 is 59659243150402.

It is not a de Polignac number, because 20405134295695 - 2²¹ = 20405132198543 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 439373286 + ... + 439419724.

It is an arithmetic number, because the mean of its divisors is an integer number (775698094080).

Almost surely, 2^{20405134295695} is an apocalyptic number.

20405134295695 is a deficient number, since it is larger than the sum of its proper divisors (4417204714865).

20405134295695 is a wasteful number, since it uses less digits than its factorization.

20405134295695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50575.

The product of its (nonzero) digits is 11664000, while the sum is 55.

The spelling of 20405134295695 in words is "twenty trillion, four hundred five billion, one hundred thirty-four million, two hundred ninety-five thousand, six hundred ninety-five".