20707399 has 8 divisors (see below), whose sum is σ = 21072240. Its totient is φ = 20344896.

The previous prime is 20707387. The next prime is 20707403. The reversal of 20707399 is 99370702.

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 20707399 - 2⁵ = 20707367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20707339) 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, 30249 + ... + 30925.

It is an arithmetic number, because the mean of its divisors is an integer number (2634030).

Almost surely, 2^20707399 is an apocalyptic number.

20707399 is a deficient number, since it is larger than the sum of its proper divisors (364841).

20707399 is an equidigital number, since it uses as much as digits as its factorization.

20707399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169.

The product of its (nonzero) digits is 23814, while the sum is 37.

The square root of 20707399 is about 4550.5383198035. The cubic root of 20707399 is about 274.6050484742.

The spelling of 20707399 in words is "twenty million, seven hundred seven thousand, three hundred ninety-nine".