20786225 has 12 divisors (see below), whose sum is σ = 25831680. Its totient is φ = 16592400.

The previous prime is 20786219. The next prime is 20786251. The reversal of 20786225 is 52268702.

It is not a de Polignac number, because 20786225 - 2¹⁸ = 20524081 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20786191 and 20786200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20480 + ... + 21470.

It is an arithmetic number, because the mean of its divisors is an integer number (2152640).

Almost surely, 2^20786225 is an apocalyptic number.

20786225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20786225 is a deficient number, since it is larger than the sum of its proper divisors (5045455).

20786225 is an equidigital number, since it uses as much as digits as its factorization.

20786225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840 (or 1835 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 20786225 is about 4559.1912660032. The cubic root of 20786225 is about 274.9530498360.

The spelling of 20786225 in words is "twenty million, seven hundred eighty-six thousand, two hundred twenty-five".