20129582 has 8 divisors (see below), whose sum is σ = 32939352. Its totient is φ = 9149800.

The previous prime is 20129579. The next prime is 20129587. The reversal of 20129582 is 28592102.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20129587) 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 3 ways as a sum of consecutive naturals, for example, 457469 + ... + 457512.

It is an arithmetic number, because the mean of its divisors is an integer number (4117419).

Almost surely, 2^20129582 is an apocalyptic number.

20129582 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20129582 is a deficient number, since it is larger than the sum of its proper divisors (12809770).

20129582 is a wasteful number, since it uses less digits than its factorization.

20129582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914994.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 20129582 is about 4486.6002719208. The cubic root of 20129582 is about 272.0267328829.

The spelling of 20129582 in words is "twenty million, one hundred twenty-nine thousand, five hundred eighty-two".