20387655444 has 48 divisors (see below), whose sum is σ = 51262912512. Its totient is φ = 6269158272.

The previous prime is 20387655401. The next prime is 20387655461. The reversal of 20387655444 is 44455678302.

It is a junction number, because it is equal to n+sod(n) for n = 20387655393 and 20387655402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211117 + ... + 292139.

It is an arithmetic number, because the mean of its divisors is an integer number (1067977344).

Almost surely, 2^20387655444 is an apocalyptic number.

It is an amenable number.

20387655444 is an abundant number, since it is smaller than the sum of its proper divisors (30875257068).

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

20387655444 is a wasteful number, since it uses less digits than its factorization.

20387655444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82656 (or 82654 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 48.

The spelling of 20387655444 in words is "twenty billion, three hundred eighty-seven million, six hundred fifty-five thousand, four hundred forty-four".