20394167225 has 6 divisors (see below), whose sum is σ = 25288767390. Its totient is φ = 16315333760.

The previous prime is 20394167207. The next prime is 20394167239. The reversal of 20394167225 is 52276149302.

It can be written as a sum of positive squares in 3 ways, for example, as 3729422761 + 16664744464 = 61069^2 + 129092^2 .

It is not a de Polignac number, because 20394167225 - 2²⁶ = 20327058361 is a prime.

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, 407883320 + ... + 407883369.

It is an arithmetic number, because the mean of its divisors is an integer number (4214794565).

Almost surely, 2^20394167225 is an apocalyptic number.

20394167225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20394167225 is a deficient number, since it is larger than the sum of its proper divisors (4894600165).

20394167225 is an equidigital number, since it uses as much as digits as its factorization.

20394167225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815766699 (or 815766694 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 20394167225 in words is "twenty billion, three hundred ninety-four million, one hundred sixty-seven thousand, two hundred twenty-five".