20530431145 has 16 divisors (see below), whose sum is σ = 28617596928. Its totient is φ = 13847221440.

The previous prime is 20530431109. The next prime is 20530431169. The reversal of 20530431145 is 54113403502.

It is not a de Polignac number, because 20530431145 - 2⁷ = 20530431017 is a prime.

It is a super-2 number, since 2×20530431145² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 4805929 + ... + 4810198.

It is an arithmetic number, because the mean of its divisors is an integer number (1788599808).

Almost surely, 2^20530431145 is an apocalyptic number.

It is an amenable number.

20530431145 is a deficient number, since it is larger than the sum of its proper divisors (8087165783).

20530431145 is an equidigital number, since it uses as much as digits as its factorization.

20530431145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9616200.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 20530431145 its reverse (54113403502), we get a palindrome (74643834647).

The spelling of 20530431145 in words is "twenty billion, five hundred thirty million, four hundred thirty-one thousand, one hundred forty-five".