20308887446 has 16 divisors (see below), whose sum is σ = 32278961376. Its totient is φ = 9550110336.

The previous prime is 20308887439. The next prime is 20308887451. The reversal of 20308887446 is 64478880302.

It is a junction number, because it is equal to n+sod(n) for n = 20308887394 and 20308887403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172001 + ... + 264956.

It is an arithmetic number, because the mean of its divisors is an integer number (2017435086).

Almost surely, 2^20308887446 is an apocalyptic number.

20308887446 is a deficient number, since it is larger than the sum of its proper divisors (11970073930).

20308887446 is a wasteful number, since it uses less digits than its factorization.

20308887446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438343.

The product of its (nonzero) digits is 2064384, while the sum is 50.

The spelling of 20308887446 in words is "twenty billion, three hundred eight million, eight hundred eighty-seven thousand, four hundred forty-six".