20445254164 has 12 divisors (see below), whose sum is σ = 35864589600. Its totient is φ = 10198228568.

The previous prime is 20445254111. The next prime is 20445254201. The reversal of 20445254164 is 46145254402.

It is a congruent number.

It is an unprimeable number.

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, 6097744 + ... + 6101095.

It is an arithmetic number, because the mean of its divisors is an integer number (2988715800).

Almost surely, 2^20445254164 is an apocalyptic number.

It is an amenable number.

20445254164 is a deficient number, since it is larger than the sum of its proper divisors (15419335436).

20445254164 is a wasteful number, since it uses less digits than its factorization.

20445254164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12199262 (or 12199260 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 37.

The spelling of 20445254164 in words is "twenty billion, four hundred forty-five million, two hundred fifty-four thousand, one hundred sixty-four".