20929317 has 8 divisors (see below), whose sum is σ = 29374560. Its totient is φ = 13218480.

The previous prime is 20929297. The next prime is 20929331. The reversal of 20929317 is 71392902.

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

It is not a de Polignac number, because 20929317 - 2⁶ = 20929253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20929357) 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, 183534 + ... + 183647.

It is an arithmetic number, because the mean of its divisors is an integer number (3671820).

Almost surely, 2^20929317 is an apocalyptic number.

It is an amenable number.

20929317 is a deficient number, since it is larger than the sum of its proper divisors (8445243).

20929317 is a wasteful number, since it uses less digits than its factorization.

20929317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367203.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 20929317 is about 4574.8570469469. The cubic root of 20929317 is about 275.5825315453.

The spelling of 20929317 in words is "twenty million, nine hundred twenty-nine thousand, three hundred seventeen".