20835225 has 30 divisors (see below), whose sum is σ = 38597790. Its totient is φ = 11111040.

The previous prime is 20835211. The next prime is 20835233. The reversal of 20835225 is 52253802.

It can be written as a sum of positive squares in 3 ways, for example, as 4359744 + 16475481 = 2088^2 + 4059^2 .

It is not a de Polignac number, because 20835225 - 2⁴ = 20835209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 3120 + ... + 7169.

It is an arithmetic number, because the mean of its divisors is an integer number (1286593).

Almost surely, 2^20835225 is an apocalyptic number.

20835225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20835225 is a deficient number, since it is larger than the sum of its proper divisors (17762565).

20835225 is a wasteful number, since it uses less digits than its factorization.

20835225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10311 (or 10297 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 20835225 is about 4564.5618628736. The cubic root of 20835225 is about 275.1689320168.

The spelling of 20835225 in words is "twenty million, eight hundred thirty-five thousand, two hundred twenty-five".