20125204025 has 6 divisors (see below), whose sum is σ = 24955253022. Its totient is φ = 16100163200.

The previous prime is 20125204019. The next prime is 20125204039. The reversal of 20125204025 is 52040252102.

It can be written as a sum of positive squares in 3 ways, for example, as 1171624441 + 18953579584 = 34229^2 + 137672^2 .

It is not a de Polignac number, because 20125204025 - 2¹⁰ = 20125203001 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 402504056 + ... + 402504105.

It is an arithmetic number, because the mean of its divisors is an integer number (4159208837).

Almost surely, 2^20125204025 is an apocalyptic number.

20125204025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20125204025 is a deficient number, since it is larger than the sum of its proper divisors (4830048997).

20125204025 is an equidigital number, since it uses as much as digits as its factorization.

20125204025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805008171 (or 805008166 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

Adding to 20125204025 its reverse (52040252102), we get a palindrome (72165456127).

The spelling of 20125204025 in words is "twenty billion, one hundred twenty-five million, two hundred four thousand, twenty-five".