20324147145 has 32 divisors (see below), whose sum is σ = 34238282880. Its totient is φ = 10266600960.

The previous prime is 20324147141. The next prime is 20324147147. The reversal of 20324147145 is 54174142302.

It is not a de Polignac number, because 20324147145 - 2² = 20324147141 is a prime.

It is a super-2 number, since 2×20324147145² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20324147141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2194725 + ... + 2203965.

It is an arithmetic number, because the mean of its divisors is an integer number (1069946340).

Almost surely, 2^20324147145 is an apocalyptic number.

It is an amenable number.

20324147145 is a deficient number, since it is larger than the sum of its proper divisors (13914135735).

20324147145 is a wasteful number, since it uses less digits than its factorization.

20324147145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16985.

The product of its (nonzero) digits is 26880, while the sum is 33.

Adding to 20324147145 its reverse (54174142302), we get a palindrome (74498289447).

The spelling of 20324147145 in words is "twenty billion, three hundred twenty-four million, one hundred forty-seven thousand, one hundred forty-five".