20555625016 has 16 divisors (see below), whose sum is σ = 39195048600. Its totient is φ = 10103612064.

The previous prime is 20555624989. The next prime is 20555625023. The reversal of 20555625016 is 61052655502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21774555 + ... + 21775498.

Almost surely, 2^20555625016 is an apocalyptic number.

It is an amenable number.

20555625016 is a deficient number, since it is larger than the sum of its proper divisors (18639423584).

20555625016 is a wasteful number, since it uses less digits than its factorization.

20555625016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43550118 (or 43550114 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 37.

The spelling of 20555625016 in words is "twenty billion, five hundred fifty-five million, six hundred twenty-five thousand, sixteen".