20305532025 has 36 divisors (see below), whose sum is σ = 37215283248. Its totient is φ = 10577760480.

The previous prime is 20305532021. The next prime is 20305532141. The reversal of 20305532025 is 52023550302.

It is not a de Polignac number, because 20305532025 - 2² = 20305532021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20305532025.

It is not an unprimeable number, because it can be changed into a prime (20305532021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1039707 + ... + 1059056.

It is an arithmetic number, because the mean of its divisors is an integer number (1033757868).

Almost surely, 2^20305532025 is an apocalyptic number.

20305532025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20305532025 is a deficient number, since it is larger than the sum of its proper divisors (16909751223).

20305532025 is a wasteful number, since it uses less digits than its factorization.

20305532025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098822 (or 2098814 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 27.

The spelling of 20305532025 in words is "twenty billion, three hundred five million, five hundred thirty-two thousand, twenty-five".