20730029 has 8 divisors (see below), whose sum is σ = 21134400. Its totient is φ = 20329056.

The previous prime is 20730011. The next prime is 20730037. The reversal of 20730029 is 92003702.

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 20730029 - 2²⁴ = 3952813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20729986 and 20730013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20730079) 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, 13814 + ... + 15240.

It is an arithmetic number, because the mean of its divisors is an integer number (2641800).

Almost surely, 2^20730029 is an apocalyptic number.

It is an amenable number.

20730029 is a deficient number, since it is larger than the sum of its proper divisors (404371).

20730029 is a wasteful number, since it uses less digits than its factorization.

20730029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 20730029 is about 4553.0241598305. The cubic root of 20730029 is about 274.7050457402.

The spelling of 20730029 in words is "twenty million, seven hundred thirty thousand, twenty-nine".