20081929 has 8 divisors (see below), whose sum is σ = 22977920. Its totient is φ = 17192736.

The previous prime is 20081911. The next prime is 20081939. The reversal of 20081929 is 92918002.

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 20081929 - 2¹⁷ = 19950857 is a prime.

It is a super-2 number, since 2×20081929² = 806567744722082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20081929.

It is not an unprimeable number, because it can be changed into a prime (20081909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10372 + ... + 12154.

It is an arithmetic number, because the mean of its divisors is an integer number (2872240).

Almost surely, 2^20081929 is an apocalyptic number.

It is an amenable number.

20081929 is a deficient number, since it is larger than the sum of its proper divisors (2895991).

20081929 is a wasteful number, since it uses less digits than its factorization.

20081929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3399.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 20081929 is about 4481.2865340212. The cubic root of 20081929 is about 271.8119058944.

The spelling of 20081929 in words is "twenty million, eighty-one thousand, nine hundred twenty-nine".