20012225 has 12 divisors (see below), whose sum is σ = 26121840. Its totient is φ = 15166800.

The previous prime is 20012219. The next prime is 20012261. The reversal of 20012225 is 52221002.

It is not a de Polignac number, because 20012225 - 2¹² = 20008129 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20591 + ... + 21540.

It is an arithmetic number, because the mean of its divisors is an integer number (2176820).

Almost surely, 2^20012225 is an apocalyptic number.

20012225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20012225 is a deficient number, since it is larger than the sum of its proper divisors (6109615).

20012225 is a wasteful number, since it uses less digits than its factorization.

20012225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42160 (or 42155 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 20012225 is about 4473.5025427510. The cubic root of 20012225 is about 271.4970566536.

Adding to 20012225 its reverse (52221002), we get a palindrome (72233227).

The spelling of 20012225 in words is "twenty million, twelve thousand, two hundred twenty-five".