20425132625 has 8 divisors (see below), whose sum is σ = 25490565672. Its totient is φ = 16340106000.

The previous prime is 20425132591. The next prime is 20425132687. The reversal of 20425132625 is 52623152402.

It can be written as a sum of positive squares in 4 ways, for example, as 6103984384 + 14321148241 = 78128^2 + 119671^2 .

It is not a de Polignac number, because 20425132625 - 2⁸ = 20425132369 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20425132591 and 20425132600.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81700406 + ... + 81700655.

It is an arithmetic number, because the mean of its divisors is an integer number (3186320709).

Almost surely, 2^20425132625 is an apocalyptic number.

20425132625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20425132625 is a deficient number, since it is larger than the sum of its proper divisors (5065433047).

20425132625 is an equidigital number, since it uses as much as digits as its factorization.

20425132625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163401076 (or 163401066 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The spelling of 20425132625 in words is "twenty billion, four hundred twenty-five million, one hundred thirty-two thousand, six hundred twenty-five".