20429329 has 8 divisors (see below), whose sum is σ = 20738432. Its totient is φ = 20122560.

The previous prime is 20429323. The next prime is 20429333. The reversal of 20429329 is 92392402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20429329 - 2⁹ = 20428817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20429329.

It is not an unprimeable number, because it can be changed into a prime (20429323) 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 7 ways as a sum of consecutive naturals, for example, 24412 + ... + 25234.

It is an arithmetic number, because the mean of its divisors is an integer number (2592304).

Almost surely, 2^20429329 is an apocalyptic number.

It is an amenable number.

20429329 is a deficient number, since it is larger than the sum of its proper divisors (309103).

20429329 is a wasteful number, since it uses less digits than its factorization.

20429329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 20429329 is about 4519.8815249960. The cubic root of 20429329 is about 273.3703239977.

The spelling of 20429329 in words is "twenty million, four hundred twenty-nine thousand, three hundred twenty-nine".