20353694 has 8 divisors (see below), whose sum is σ = 30549960. Its totient is φ = 10170376.

The previous prime is 20353691. The next prime is 20353703. The reversal of 20353694 is 49635302.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20353694.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20353691) 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 3 ways as a sum of consecutive naturals, for example, 3497 + ... + 7275.

It is an arithmetic number, because the mean of its divisors is an integer number (3818745).

Almost surely, 2^20353694 is an apocalyptic number.

20353694 is a deficient number, since it is larger than the sum of its proper divisors (10196266).

20353694 is a wasteful number, since it uses less digits than its factorization.

20353694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6474.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 20353694 is about 4511.5068436167. The cubic root of 20353694 is about 273.0325427356.

Adding to 20353694 its reverse (49635302), we get a palindrome (69988996).

The spelling of 20353694 in words is "twenty million, three hundred fifty-three thousand, six hundred ninety-four".