20329929 has 12 divisors (see below), whose sum is σ = 29405376. Its totient is φ = 13534872.

The previous prime is 20329921. The next prime is 20329951. The reversal of 20329929 is 92992302.

It is not a de Polignac number, because 20329929 - 2³ = 20329921 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20329893 and 20329902.

It is not an unprimeable number, because it can be changed into a prime (20329921) 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, 10084 + ... + 11930.

It is an arithmetic number, because the mean of its divisors is an integer number (2450448).

Almost surely, 2^20329929 is an apocalyptic number.

It is an amenable number.

20329929 is a deficient number, since it is larger than the sum of its proper divisors (9075447).

20329929 is a wasteful number, since it uses less digits than its factorization.

20329929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3076 (or 3073 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 20329929 is about 4508.8722536794. The cubic root of 20329929 is about 272.9262369647.

The spelling of 20329929 in words is "twenty million, three hundred twenty-nine thousand, nine hundred twenty-nine".