20009441536 has 72 divisors (see below), whose sum is σ = 47119138304. Its totient is φ = 8298823680.

The previous prime is 20009441521. The next prime is 20009441539. The reversal of 20009441536 is 63514490002.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20009441539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124545 + ... + 235648.

Almost surely, 2^20009441536 is an apocalyptic number.

It is an amenable number.

20009441536 is an abundant number, since it is smaller than the sum of its proper divisors (27109696768).

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

20009441536 is an equidigital number, since it uses as much as digits as its factorization.

20009441536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360247 (or 360233 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 20009441536 in words is "twenty billion, nine million, four hundred forty-one thousand, five hundred thirty-six".