20364625 has 8 divisors (see below), whose sum is σ = 25415208. Its totient is φ = 16291600.

The previous prime is 20364571. The next prime is 20364649. The reversal of 20364625 is 52646302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 87616 + 20277009 = 296^2 + 4503^2 .

It is not a de Polignac number, because 20364625 - 2⁷ = 20364497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20364593 and 20364602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81334 + ... + 81583.

It is an arithmetic number, because the mean of its divisors is an integer number (3176901).

Almost surely, 2^20364625 is an apocalyptic number.

20364625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20364625 is a deficient number, since it is larger than the sum of its proper divisors (5050583).

20364625 is an equidigital number, since it uses as much as digits as its factorization.

20364625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162932 (or 162922 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 20364625 is about 4512.7181387718. The cubic root of 20364625 is about 273.0814115814.

The spelling of 20364625 in words is "twenty million, three hundred sixty-four thousand, six hundred twenty-five".