20163730423205 has 16 divisors (see below), whose sum is σ = 24827876943408. Its totient is φ = 15711360000000.

The previous prime is 20163730423169. The next prime is 20163730423241. The reversal of 20163730423205 is 50232403736102.

It is an interprime number because it is at equal distance from previous prime (20163730423169) and next prime (20163730423241).

It can be written as a sum of positive squares in 8 ways, for example, as 5471772429124 + 14691957994081 = 2339182^2 + 3833009^2 .

It is not a de Polignac number, because 20163730423205 - 2³⁶ = 20095010946469 is a prime.

It is a Duffinian number.

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, 81706796 + ... + 81953205.

It is an arithmetic number, because the mean of its divisors is an integer number (1551742308963).

Almost surely, 2^{20163730423205} is an apocalyptic number.

It is an amenable number.

20163730423205 is a deficient number, since it is larger than the sum of its proper divisors (4664146520203).

20163730423205 is a wasteful number, since it uses less digits than its factorization.

20163730423205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163660648.

The product of its (nonzero) digits is 181440, while the sum is 38.

The spelling of 20163730423205 in words is "twenty trillion, one hundred sixty-three billion, seven hundred thirty million, four hundred twenty-three thousand, two hundred five".