20835574450173 has 32 divisors (see below), whose sum is σ = 35287132339200. Its totient is φ = 11902677921648.

The previous prime is 20835574450157. The next prime is 20835574450189. The reversal of 20835574450173 is 37105447553802.

20835574450173 is a `hidden beast` number, since 2 + 0 + 8 + 3 + 5 + 574 + 4 + 50 + 17 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (20835574450157) and next prime (20835574450189).

It is not a de Polignac number, because 20835574450173 - 2⁴ = 20835574450157 is a prime.

It is a super-2 number, since 2×20835574450173² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20835574450673) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14906311 + ... + 16244052.

It is an arithmetic number, because the mean of its divisors is an integer number (1102722885600).

Almost surely, 2^{20835574450173} is an apocalyptic number.

It is an amenable number.

20835574450173 is a deficient number, since it is larger than the sum of its proper divisors (14451557889027).

20835574450173 is a wasteful number, since it uses less digits than its factorization.

20835574450173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31153918 (or 31153912 counting only the distinct ones).

The product of its (nonzero) digits is 14112000, while the sum is 54.

The spelling of 20835574450173 in words is "twenty trillion, eight hundred thirty-five billion, five hundred seventy-four million, four hundred fifty thousand, one hundred seventy-three".