20531420325 has 120 divisors (see below), whose sum is σ = 41654104800. Its totient is φ = 9935706240.

The previous prime is 20531420323. The next prime is 20531420347. The reversal of 20531420325 is 52302413502.

It is a happy number.

20531420325 is a `hidden beast` number, since 2 + 0 + 5 + 314 + 20 + 325 = 666.

It is not a de Polignac number, because 20531420325 - 2¹ = 20531420323 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20531420323) 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 119 ways as a sum of consecutive naturals, for example, 1546566 + ... + 1559784.

It is an arithmetic number, because the mean of its divisors is an integer number (347117540).

Almost surely, 2^20531420325 is an apocalyptic number.

20531420325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20531420325 is an abundant number, since it is smaller than the sum of its proper divisors (21122684475).

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

20531420325 is a wasteful number, since it uses less digits than its factorization.

20531420325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13313 (or 13299 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 20531420325 its reverse (52302413502), we get a palindrome (72833833827).

The spelling of 20531420325 in words is "twenty billion, five hundred thirty-one million, four hundred twenty thousand, three hundred twenty-five".