20353445646 has 16 divisors (see below), whose sum is σ = 40712834304. Its totient is φ = 6783491384.

The previous prime is 20353445633. The next prime is 20353445663. The reversal of 20353445646 is 64654435302.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20353445598 and 20353445607.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 202470 + ... + 285833.

It is an arithmetic number, because the mean of its divisors is an integer number (2544552144).

Almost surely, 2^20353445646 is an apocalyptic number.

20353445646 is an abundant number, since it is smaller than the sum of its proper divisors (20359388658).

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

20353445646 is a wasteful number, since it uses less digits than its factorization.

20353445646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495255.

The product of its (nonzero) digits is 1036800, while the sum is 42.

The spelling of 20353445646 in words is "twenty billion, three hundred fifty-three million, four hundred forty-five thousand, six hundred forty-six".