20906524 has 12 divisors (see below), whose sum is σ = 37766848. Its totient is φ = 10116000.

The previous prime is 20906521. The next prime is 20906533. The reversal of 20906524 is 42560902.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20906492 and 20906501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20906521) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 84177 + ... + 84424.

Almost surely, 2^20906524 is an apocalyptic number.

It is an amenable number.

20906524 is a deficient number, since it is larger than the sum of its proper divisors (16860324).

20906524 is a wasteful number, since it uses less digits than its factorization.

20906524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168636 (or 168634 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 20906524 is about 4572.3652522518. The cubic root of 20906524 is about 275.4824544740.

The spelling of 20906524 in words is "twenty million, nine hundred six thousand, five hundred twenty-four".