20982129 has 8 divisors (see below), whose sum is σ = 31972800. Its totient is φ = 11989776.

The previous prime is 20982127. The next prime is 20982149. The reversal of 20982129 is 92128902.

It is a happy number.

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

It is not a de Polignac number, because 20982129 - 2¹ = 20982127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20982129.

It is not an unprimeable number, because it can be changed into a prime (20982127) 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, 499554 + ... + 499595.

It is an arithmetic number, because the mean of its divisors is an integer number (3996600).

Almost surely, 2^20982129 is an apocalyptic number.

It is an amenable number.

20982129 is a deficient number, since it is larger than the sum of its proper divisors (10990671).

20982129 is an equidigital number, since it uses as much as digits as its factorization.

20982129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999159.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 20982129 is about 4580.6253939828. The cubic root of 20982129 is about 275.8141339450.

The spelling of 20982129 in words is "twenty million, nine hundred eighty-two thousand, one hundred twenty-nine".