20380621649344 has 84 divisors (see below), whose sum is σ = 44455969357632. Its totient is φ = 9263435991040.

The previous prime is 20380621649309. The next prime is 20380621649359. The reversal of 20380621649344 is 44394612608302.

It is a junction number, because it is equal to n+sod(n) for n = 20380621649291 and 20380621649300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178496337 + ... + 178610479.

It is an arithmetic number, because the mean of its divisors is an integer number (529237730448).

Almost surely, 2^{20380621649344} is an apocalyptic number.

It is an amenable number.

20380621649344 is an abundant number, since it is smaller than the sum of its proper divisors (24075347708288).

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

20380621649344 is a wasteful number, since it uses less digits than its factorization.

20380621649344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137234 (or 137213 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 52.

The spelling of 20380621649344 in words is "twenty trillion, three hundred eighty billion, six hundred twenty-one million, six hundred forty-nine thousand, three hundred forty-four".