20383225 has 12 divisors (see below), whose sum is σ = 25561980. Its totient is φ = 16121600.

The previous prime is 20383183. The next prime is 20383229. The reversal of 20383225 is 52238302.

It can be written as a sum of positive squares in 6 ways, for example, as 2985984 + 17397241 = 1728^2 + 4171^2 .

It is not a de Polignac number, because 20383225 - 2¹¹ = 20381177 is a prime.

It is a super-2 number, since 2×20383225² = 830951722801250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 20383225.

It is not an unprimeable number, because it can be changed into a prime (20383229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2356 + ... + 6805.

It is an arithmetic number, because the mean of its divisors is an integer number (2130165).

Almost surely, 2^20383225 is an apocalyptic number.

20383225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20383225 is a deficient number, since it is larger than the sum of its proper divisors (5178755).

20383225 is an equidigital number, since it uses as much as digits as its factorization.

20383225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9260 (or 9255 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20383225 is about 4514.7785106249. The cubic root of 20383225 is about 273.1645257830.

The spelling of 20383225 in words is "twenty million, three hundred eighty-three thousand, two hundred twenty-five".