20699329 has 8 divisors (see below), whose sum is σ = 23683968. Its totient is φ = 17721600.

The previous prime is 20699299. The next prime is 20699339. The reversal of 20699329 is 92399602.

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 20699329 - 2⁹ = 20698817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20699291 and 20699300.

It is not an unprimeable number, because it can be changed into a prime (20699339) 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, 10284 + ... + 12130.

It is an arithmetic number, because the mean of its divisors is an integer number (2960496).

Almost surely, 2^20699329 is an apocalyptic number.

It is an amenable number.

20699329 is a deficient number, since it is larger than the sum of its proper divisors (2984639).

20699329 is a wasteful number, since it uses less digits than its factorization.

20699329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3455.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 20699329 is about 4549.6515251171. The cubic root of 20699329 is about 274.5693711995.

The spelling of 20699329 in words is "twenty million, six hundred ninety-nine thousand, three hundred twenty-nine".