20380621649343 has 16 divisors (see below), whose sum is σ = 27230349792000. Its totient is φ = 13558990765824.

The previous prime is 20380621649309. The next prime is 20380621649359. The reversal of 20380621649343 is 34394612608302.

It is not a de Polignac number, because 20380621649343 - 2⁹ = 20380621648831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20380621649383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23576830 + ... + 24425972.

It is an arithmetic number, because the mean of its divisors is an integer number (1701896862000).

Almost surely, 2^{20380621649343} is an apocalyptic number.

20380621649343 is a deficient number, since it is larger than the sum of its proper divisors (6849728142657).

20380621649343 is a wasteful number, since it uses less digits than its factorization.

20380621649343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865678.

The product of its (nonzero) digits is 4478976, while the sum is 51.

The spelling of 20380621649343 in words is "twenty trillion, three hundred eighty billion, six hundred twenty-one million, six hundred forty-nine thousand, three hundred forty-three".