20445475180 has 24 divisors (see below), whose sum is σ = 46238229072. Its totient is φ = 7549098432.

The previous prime is 20445475079. The next prime is 20445475201. The reversal of 20445475180 is 8157454402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39317962 + ... + 39318481.

It is an arithmetic number, because the mean of its divisors is an integer number (1926592878).

Almost surely, 2^20445475180 is an apocalyptic number.

20445475180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20445475180 is an abundant number, since it is smaller than the sum of its proper divisors (25792753892).

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

20445475180 is a wasteful number, since it uses less digits than its factorization.

20445475180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78636465 (or 78636463 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 40.

The spelling of 20445475180 in words is "twenty billion, four hundred forty-five million, four hundred seventy-five thousand, one hundred eighty".