20530431129 has 64 divisors (see below), whose sum is σ = 31516531200. Its totient is φ = 11864676096.

The previous prime is 20530431109. The next prime is 20530431169. The reversal of 20530431129 is 92113403502.

It is not a de Polignac number, because 20530431129 - 2⁷ = 20530431001 is a prime.

It is a super-2 number, since 2×20530431129² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20530431096 and 20530431105.

It is not an unprimeable number, because it can be changed into a prime (20530431109) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 7070692 + ... + 7073594.

It is an arithmetic number, because the mean of its divisors is an integer number (492445800).

Almost surely, 2^20530431129 is an apocalyptic number.

20530431129 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20530431129 is a deficient number, since it is larger than the sum of its proper divisors (10986100071).

20530431129 is a wasteful number, since it uses less digits than its factorization.

20530431129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3011 (or 2985 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The spelling of 20530431129 in words is "twenty billion, five hundred thirty million, four hundred thirty-one thousand, one hundred twenty-nine".