20145256216 has 16 divisors (see below), whose sum is σ = 37780694640. Its totient is φ = 10070404320.

The previous prime is 20145256211. The next prime is 20145256237. The reversal of 20145256216 is 61265254102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20145256211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239155 + ... + 312226.

It is an arithmetic number, because the mean of its divisors is an integer number (2361293415).

Almost surely, 2^20145256216 is an apocalyptic number.

It is an amenable number.

20145256216 is a deficient number, since it is larger than the sum of its proper divisors (17635438424).

20145256216 is a wasteful number, since it uses less digits than its factorization.

20145256216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555954 (or 555950 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 20145256216 in words is "twenty billion, one hundred forty-five million, two hundred fifty-six thousand, two hundred sixteen".