20325543402520 has 32 divisors (see below), whose sum is σ = 46176477253920. Its totient is φ = 8051283210240.

The previous prime is 20325543402421. The next prime is 20325543402529. The reversal of 20325543402520 is 2520434552302.

It is a self number, because there is not a number n which added to its sum of digits gives 20325543402520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20325543402529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2466688041 + ... + 2466696280.

It is an arithmetic number, because the mean of its divisors is an integer number (1443014914185).

Almost surely, 2^{20325543402520} is an apocalyptic number.

20325543402520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20325543402520 is an abundant number, since it is smaller than the sum of its proper divisors (25850933851400).

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

20325543402520 is a wasteful number, since it uses less digits than its factorization.

20325543402520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4933384435 (or 4933384431 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 37.

Adding to 20325543402520 its reverse (2520434552302), we get a palindrome (22845977954822).

The spelling of 20325543402520 in words is "twenty trillion, three hundred twenty-five billion, five hundred forty-three million, four hundred two thousand, five hundred twenty".