20055139544 has 32 divisors (see below), whose sum is σ = 42436429200. Its totient is φ = 8801627520.

The previous prime is 20055139541. The next prime is 20055139553. The reversal of 20055139544 is 44593155002.

It is a junction number, because it is equal to n+sod(n) for n = 20055139498 and 20055139507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20055139541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3926747 + ... + 3931850.

Almost surely, 2^20055139544 is an apocalyptic number.

It is an amenable number.

20055139544 is an abundant number, since it is smaller than the sum of its proper divisors (22381289656).

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

20055139544 is a wasteful number, since it uses less digits than its factorization.

20055139544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7858643 (or 7858639 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 20055139544 in words is "twenty billion, fifty-five million, one hundred thirty-nine thousand, five hundred forty-four".