20299393 has 8 divisors (see below), whose sum is σ = 20664000. Its totient is φ = 19937808.

The previous prime is 20299381. The next prime is 20299399. The reversal of 20299393 is 39399202.

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 20299393 - 2⁵ = 20299361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20299399) 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 7 ways as a sum of consecutive naturals, for example, 15903 + ... + 17131.

It is an arithmetic number, because the mean of its divisors is an integer number (2583000).

Almost surely, 2^20299393 is an apocalyptic number.

It is an amenable number.

20299393 is a deficient number, since it is larger than the sum of its proper divisors (364607).

20299393 is a wasteful number, since it uses less digits than its factorization.

20299393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 20299393 is about 4505.4847685904. The cubic root of 20299393 is about 272.7895214239.

The spelling of 20299393 in words is "twenty million, two hundred ninety-nine thousand, three hundred ninety-three".