20161633396 has 12 divisors (see below), whose sum is σ = 36143416260. Its totient is φ = 9834943040.

The previous prime is 20161633369. The next prime is 20161633397. The reversal of 20161633396 is 69333616102.

It can be written as a sum of positive squares in 2 ways, for example, as 10034028900 + 10127604496 = 100170^2 + 100636^2 .

It is a super-2 number, since 2×20161633396² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20161633397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61468231 + ... + 61468558.

It is an arithmetic number, because the mean of its divisors is an integer number (3011951355).

Almost surely, 2^20161633396 is an apocalyptic number.

It is an amenable number.

20161633396 is a deficient number, since it is larger than the sum of its proper divisors (15981782864).

20161633396 is a wasteful number, since it uses less digits than its factorization.

20161633396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122936834 (or 122936832 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 40.

The spelling of 20161633396 in words is "twenty billion, one hundred sixty-one million, six hundred thirty-three thousand, three hundred ninety-six".