20045212025 has 6 divisors (see below), whose sum is σ = 24856062942. Its totient is φ = 16036169600.

The previous prime is 20045212009. The next prime is 20045212037. The reversal of 20045212025 is 52021254002.

It can be written as a sum of positive squares in 3 ways, for example, as 479916649 + 19565295376 = 21907^2 + 139876^2 .

It is not a de Polignac number, because 20045212025 - 2⁴ = 20045212009 is a prime.

It is a Duffinian number.

It is a Curzon 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, 400904216 + ... + 400904265.

It is an arithmetic number, because the mean of its divisors is an integer number (4142677157).

Almost surely, 2^20045212025 is an apocalyptic number.

20045212025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20045212025 is a deficient number, since it is larger than the sum of its proper divisors (4810850917).

20045212025 is an equidigital number, since it uses as much as digits as its factorization.

20045212025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801808491 (or 801808486 counting only the distinct ones).

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

Adding to 20045212025 its reverse (52021254002), we get a palindrome (72066466027).

The spelling of 20045212025 in words is "twenty billion, forty-five million, two hundred twelve thousand, twenty-five".