20247625 has 16 divisors (see below), whose sum is σ = 25863552. Its totient is φ = 15817200.

The previous prime is 20247611. The next prime is 20247671. The reversal of 20247625 is 52674202.

It is not a de Polignac number, because 20247625 - 2⁵ = 20247593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20247593 and 20247602.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3492 + ... + 7258.

It is an arithmetic number, because the mean of its divisors is an integer number (1616472).

Almost surely, 2^20247625 is an apocalyptic number.

20247625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20247625 is a deficient number, since it is larger than the sum of its proper divisors (5615927).

20247625 is an equidigital number, since it uses as much as digits as its factorization.

20247625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3825 (or 3815 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 20247625 is about 4499.7361033732. The cubic root of 20247625 is about 272.5574325541.

The spelling of 20247625 in words is "twenty million, two hundred forty-seven thousand, six hundred twenty-five".