20454625 has 8 divisors (see below), whose sum is σ = 25527528. Its totient is φ = 16363600.

The previous prime is 20454619. The next prime is 20454641. The reversal of 20454625 is 52645402.

It can be written as a sum of positive squares in 4 ways, for example, as 312481 + 20142144 = 559^2 + 4488^2 .

It is not a de Polignac number, because 20454625 - 2⁵ = 20454593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20454593 and 20454602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81694 + ... + 81943.

It is an arithmetic number, because the mean of its divisors is an integer number (3190941).

Almost surely, 2^20454625 is an apocalyptic number.

20454625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20454625 is a deficient number, since it is larger than the sum of its proper divisors (5072903).

20454625 is an equidigital number, since it uses as much as digits as its factorization.

20454625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163652 (or 163642 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 20454625 is about 4522.6789627388. The cubic root of 20454625 is about 273.4831083107.

It can be divided in two parts, 2045 and 4625, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 20454625 in words is "twenty million, four hundred fifty-four thousand, six hundred twenty-five".