20358161694 has 96 divisors (see below), whose sum is σ = 47950576128. Its totient is φ = 6205248000.

The previous prime is 20358161693. The next prime is 20358161711. The reversal of 20358161694 is 49616185302.

20358161694 is a `hidden beast` number, since 2 + 0 + 3 + 581 + 6 + 1 + 69 + 4 = 666.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12558204 + ... + 12559824.

It is an arithmetic number, because the mean of its divisors is an integer number (499485168).

Almost surely, 2^20358161694 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20358161694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23975288064).

20358161694 is an abundant number, since it is smaller than the sum of its proper divisors (27592414434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20358161694 is a wasteful number, since it uses less digits than its factorization.

20358161694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2114 (or 2111 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 20358161694 in words is "twenty billion, three hundred fifty-eight million, one hundred sixty-one thousand, six hundred ninety-four".