20524156 has 6 divisors (see below), whose sum is σ = 35917280. Its totient is φ = 10262076.

The previous prime is 20524129. The next prime is 20524187. The reversal of 20524156 is 65142502.

It is a self number, because there is not a number n which added to its sum of digits gives 20524156.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2565516 + ... + 2565523.

Almost surely, 2^20524156 is an apocalyptic number.

It is an amenable number.

20524156 is a deficient number, since it is larger than the sum of its proper divisors (15393124).

20524156 is a wasteful number, since it uses less digits than its factorization.

20524156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5131043 (or 5131041 counting only the distinct ones).

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

The square root of 20524156 is about 4530.3593676440. The cubic root of 20524156 is about 273.7926397443.

Adding to 20524156 its reverse (65142502), we get a palindrome (85666658).

It can be divided in two parts, 20 and 524156, that added together give a square (524176 = 724²).

The spelling of 20524156 in words is "twenty million, five hundred twenty-four thousand, one hundred fifty-six".