20416525 has 12 divisors (see below), whose sum is σ = 26417952. Its totient is φ = 15622640.

The previous prime is 20416457. The next prime is 20416549. The reversal of 20416525 is 52561402.

It is not a de Polignac number, because 20416525 - 2²¹ = 18319373 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20416525.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 17179 + ... + 18328.

It is an arithmetic number, because the mean of its divisors is an integer number (2201496).

Almost surely, 2^20416525 is an apocalyptic number.

20416525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20416525 is a deficient number, since it is larger than the sum of its proper divisors (6001427).

20416525 is a wasteful number, since it uses less digits than its factorization.

20416525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35540 (or 35535 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 20416525 is about 4518.4648941870. The cubic root of 20416525 is about 273.3132008108.

Adding to 20416525 its reverse (52561402), we get a palindrome (72977927).

The spelling of 20416525 in words is "twenty million, four hundred sixteen thousand, five hundred twenty-five".