20516325 has 12 divisors (see below), whose sum is σ = 33920448. Its totient is φ = 10942000.

The previous prime is 20516323. The next prime is 20516341. The reversal of 20516325 is 52361502.

It is not a de Polignac number, because 20516325 - 2¹ = 20516323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20516295 and 20516304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20516323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136701 + ... + 136850.

It is an arithmetic number, because the mean of its divisors is an integer number (2826704).

Almost surely, 2^20516325 is an apocalyptic number.

20516325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20516325 is a deficient number, since it is larger than the sum of its proper divisors (13404123).

20516325 is a wasteful number, since it uses less digits than its factorization.

20516325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273564 (or 273559 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 20516325 is about 4529.4950049647. The cubic root of 20516325 is about 273.7578134172.

Adding to 20516325 its reverse (52361502), we get a palindrome (72877827).

The spelling of 20516325 in words is "twenty million, five hundred sixteen thousand, three hundred twenty-five".