20403332122025 has 6 divisors (see below), whose sum is σ = 25300131831342. Its totient is φ = 16322665697600.

The previous prime is 20403332122021. The next prime is 20403332122157. The reversal of 20403332122025 is 52022123330402.

It can be written as a sum of positive squares in 3 ways, for example, as 107802558889 + 20295529563136 = 328333^2 + 4505056^2 .

It is not a de Polignac number, because 20403332122025 - 2² = 20403332122021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20403332122021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 408066642416 + ... + 408066642465.

It is an arithmetic number, because the mean of its divisors is an integer number (4216688638557).

Almost surely, 2^{20403332122025} is an apocalyptic number.

20403332122025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20403332122025 is a deficient number, since it is larger than the sum of its proper divisors (4896799709317).

20403332122025 is an equidigital number, since it uses as much as digits as its factorization.

20403332122025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816133284891 (or 816133284886 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 20403332122025 its reverse (52022123330402), we get a palindrome (72425455452427).

The spelling of 20403332122025 in words is "twenty trillion, four hundred three billion, three hundred thirty-two million, one hundred twenty-two thousand, twenty-five".