20078447572 has 6 divisors (see below), whose sum is σ = 35137283258. Its totient is φ = 10039223784.

The previous prime is 20078447537. The next prime is 20078447573. The reversal of 20078447572 is 27574487002.

It can be written as a sum of positive squares in only one way, i.e., 10125591876 + 9952855696 = 100626^2 + 99764^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20078447573) by changing a digit.

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 as a sum of consecutive naturals, namely, 2509805943 + ... + 2509805950.

Almost surely, 2^20078447572 is an apocalyptic number.

It is an amenable number.

20078447572 is a deficient number, since it is larger than the sum of its proper divisors (15058835686).

20078447572 is a wasteful number, since it uses less digits than its factorization.

20078447572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5019611897 (or 5019611895 counting only the distinct ones).

The product of its (nonzero) digits is 878080, while the sum is 46.

The spelling of 20078447572 in words is "twenty billion, seventy-eight million, four hundred forty-seven thousand, five hundred seventy-two".