20355616746 has 24 divisors (see below), whose sum is σ = 44293132260. Its totient is φ = 6756083136.

The previous prime is 20355616739. The next prime is 20355616823. The reversal of 20355616746 is 64761655302.

20355616746 is a `hidden beast` number, since 20 + 3 + 5 + 5 + 616 + 7 + 4 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18642898521 + 1712718225 = 136539^2 + 41385^2 .

It is a super-2 number, since 2×20355616746² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2422561 + ... + 2430948.

Almost surely, 2^20355616746 is an apocalyptic number.

20355616746 is an abundant number, since it is smaller than the sum of its proper divisors (23937515514).

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

20355616746 is a wasteful number, since it uses less digits than its factorization.

20355616746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4853750 (or 4853747 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 20355616746 in words is "twenty billion, three hundred fifty-five million, six hundred sixteen thousand, seven hundred forty-six".