20730429 has 48 divisors (see below), whose sum is σ = 34100352. Its totient is φ = 12063744.

The previous prime is 20730421. The next prime is 20730433. The reversal of 20730429 is 92403702.

20730429 is a `hidden beast` number, since 207 + 30 + 429 = 666.

It is not a de Polignac number, because 20730429 - 2³ = 20730421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20730421) 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 47 ways as a sum of consecutive naturals, for example, 151249 + ... + 151385.

It is an arithmetic number, because the mean of its divisors is an integer number (710424).

Almost surely, 2^20730429 is an apocalyptic number.

It is an amenable number.

20730429 is a deficient number, since it is larger than the sum of its proper divisors (13369923).

20730429 is a wasteful number, since it uses less digits than its factorization.

20730429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 20730429 is about 4553.0680864665. The cubic root of 20730429 is about 274.7068126023.

The spelling of 20730429 in words is "twenty million, seven hundred thirty thousand, four hundred twenty-nine".