20029225 has 12 divisors (see below), whose sum is σ = 24892876. Its totient is φ = 15986880.

The previous prime is 20029199. The next prime is 20029241. The reversal of 20029225 is 52292002.

It can be written as a sum of positive squares in 6 ways, for example, as 4756761 + 15272464 = 2181^2 + 3908^2 .

It is not a de Polignac number, because 20029225 - 2⁹ = 20028713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20029196 and 20029205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17779 + ... + 18871.

Almost surely, 2^20029225 is an apocalyptic number.

20029225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20029225 is a deficient number, since it is larger than the sum of its proper divisors (4863651).

20029225 is a wasteful number, since it uses less digits than its factorization.

20029225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836 (or 1831 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20029225 is about 4475.4022165611. The cubic root of 20029225 is about 271.5739120702.

The spelling of 20029225 in words is "twenty million, twenty-nine thousand, two hundred twenty-five".