20012501225 has 6 divisors (see below), whose sum is σ = 24815501550. Its totient is φ = 16010000960.

The previous prime is 20012501191. The next prime is 20012501291. The reversal of 20012501225 is 52210521002.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 6224105449 + 13788395776 = 78893^2 + 117424^2 .

It is not a de Polignac number, because 20012501225 - 2¹⁴ = 20012484841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20012501197 and 20012501206.

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, 400250000 + ... + 400250049.

It is an arithmetic number, because the mean of its divisors is an integer number (4135916925).

Almost surely, 2^20012501225 is an apocalyptic number.

20012501225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20012501225 is a deficient number, since it is larger than the sum of its proper divisors (4803000325).

20012501225 is an equidigital number, since it uses as much as digits as its factorization.

20012501225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800500059 (or 800500054 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The spelling of 20012501225 in words is "twenty billion, twelve million, five hundred one thousand, two hundred twenty-five".