20380621649345 has 16 divisors (see below), whose sum is σ = 24472082518848. Its totient is φ = 16294274322240.

The previous prime is 20380621649309. The next prime is 20380621649359. The reversal of 20380621649345 is 54394612608302.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20380621649345 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132370547 + ... + 132524423.

It is an arithmetic number, because the mean of its divisors is an integer number (1529505157428).

Almost surely, 2^{20380621649345} is an apocalyptic number.

It is an amenable number.

20380621649345 is a deficient number, since it is larger than the sum of its proper divisors (4091460869503).

20380621649345 is a wasteful number, since it uses less digits than its factorization.

20380621649345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170320.

The product of its (nonzero) digits is 7464960, while the sum is 53.

The spelling of 20380621649345 in words is "twenty trillion, three hundred eighty billion, six hundred twenty-one million, six hundred forty-nine thousand, three hundred forty-five".