20536929 has 72 divisors (see below), whose sum is σ = 38221920. Its totient is φ = 10859184.

The previous prime is 20536927. The next prime is 20536933. The reversal of 20536929 is 92963502.

It is not a de Polignac number, because 20536929 - 2¹ = 20536927 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20536893 and 20536902.

It is not an unprimeable number, because it can be changed into a prime (20536921) 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 71 ways as a sum of consecutive naturals, for example, 477582 + ... + 477624.

It is an arithmetic number, because the mean of its divisors is an integer number (530860).

Almost surely, 2^20536929 is an apocalyptic number.

It is an amenable number.

20536929 is a deficient number, since it is larger than the sum of its proper divisors (17684991).

20536929 is a wasteful number, since it uses less digits than its factorization.

20536929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 20536929 is about 4531.7688599486. The cubic root of 20536929 is about 273.8494253220.

The spelling of 20536929 in words is "twenty million, five hundred thirty-six thousand, nine hundred twenty-nine".