20109202025 has 24 divisors (see below), whose sum is σ = 27331265568. Its totient is φ = 14555520000.

The previous prime is 20109202021. The next prime is 20109202051. The reversal of 20109202025 is 52020290102.

It is not a de Polignac number, because 20109202025 - 2² = 20109202021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20109202021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115256 + ... + 231305.

It is an arithmetic number, because the mean of its divisors is an integer number (1138802732).

Almost surely, 2^20109202025 is an apocalyptic number.

20109202025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20109202025 is a deficient number, since it is larger than the sum of its proper divisors (7222063543).

20109202025 is a wasteful number, since it uses less digits than its factorization.

20109202025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346793 (or 346788 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 20109202025 its reverse (52020290102), we get a palindrome (72129492127).

The spelling of 20109202025 in words is "twenty billion, one hundred nine million, two hundred two thousand, twenty-five".