20529129 has 8 divisors (see below), whose sum is σ = 28316160. Its totient is φ = 13214096.

The previous prime is 20529097. The next prime is 20529167. The reversal of 20529129 is 92192502.

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 20529129 - 2⁵ = 20529097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20529096 and 20529105.

It is not an unprimeable number, because it can be changed into a prime (20529529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117897 + ... + 118070.

It is an arithmetic number, because the mean of its divisors is an integer number (3539520).

Almost surely, 2^20529129 is an apocalyptic number.

20529129 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20529129 is a deficient number, since it is larger than the sum of its proper divisors (7787031).

20529129 is a wasteful number, since it uses less digits than its factorization.

20529129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235999.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 20529129 is about 4530.9081871077. The cubic root of 20529129 is about 273.8147512641.

The spelling of 20529129 in words is "twenty million, five hundred twenty-nine thousand, one hundred twenty-nine".