20161982265 has 16 divisors (see below), whose sum is σ = 33045981696. Its totient is φ = 10490787200.

The previous prime is 20161982249. The next prime is 20161982273. The reversal of 20161982265 is 56228916102.

It is not a de Polignac number, because 20161982265 - 2⁴ = 20161982249 is a prime.

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, 16391241 + ... + 16392470.

It is an arithmetic number, because the mean of its divisors is an integer number (2065373856).

Almost surely, 2^20161982265 is an apocalyptic number.

It is an amenable number.

20161982265 is a deficient number, since it is larger than the sum of its proper divisors (12883999431).

20161982265 is a wasteful number, since it uses less digits than its factorization.

20161982265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32783760.

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 20161982265 in words is "twenty billion, one hundred sixty-one million, nine hundred eighty-two thousand, two hundred sixty-five".