20358161696 has 12 divisors (see below), whose sum is σ = 40080130902. Its totient is φ = 10179080832.

The previous prime is 20358161693. The next prime is 20358161711. The reversal of 20358161696 is 69616185302.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15810547600 + 4547614096 = 125740^2 + 67436^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20358161696.

It is not an unprimeable number, because it can be changed into a prime (20358161693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318096245 + ... + 318096308.

Almost surely, 2^20358161696 is an apocalyptic number.

It is an amenable number.

20358161696 is a deficient number, since it is larger than the sum of its proper divisors (19721969206).

20358161696 is an equidigital number, since it uses as much as digits as its factorization.

20358161696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636192563 (or 636192555 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 20358161696 in words is "twenty billion, three hundred fifty-eight million, one hundred sixty-one thousand, six hundred ninety-six".