20532445147 has 6 divisors (see below), whose sum is σ = 21811282868. Its totient is φ = 19324653984.

The previous prime is 20532445127. The next prime is 20532445163. The reversal of 20532445147 is 74154423502.

It is a de Polignac number, because none of the positive numbers 2^k-20532445147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20532445127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35522973 + ... + 35523550.

Almost surely, 2^20532445147 is an apocalyptic number.

20532445147 is a deficient number, since it is larger than the sum of its proper divisors (1278837721).

20532445147 is an equidigital number, since it uses as much as digits as its factorization.

20532445147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71046557 (or 71046540 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 37.

Adding to 20532445147 its reverse (74154423502), we get a palindrome (94686868649).

The spelling of 20532445147 in words is "twenty billion, five hundred thirty-two million, four hundred forty-five thousand, one hundred forty-seven".