20346663 has 8 divisors (see below), whose sum is σ = 28556800. Its totient is φ = 12850488.

The previous prime is 20346659. The next prime is 20346673. The reversal of 20346663 is 36664302.

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

It is not a de Polignac number, because 20346663 - 2² = 20346659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20346663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20346643) 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, 178423 + ... + 178536.

It is an arithmetic number, because the mean of its divisors is an integer number (3569600).

Almost surely, 2^20346663 is an apocalyptic number.

20346663 is a deficient number, since it is larger than the sum of its proper divisors (8210137).

20346663 is a wasteful number, since it uses less digits than its factorization.

20346663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356981.

The product of its (nonzero) digits is 15552, while the sum is 30.

The square root of 20346663 is about 4510.7275466381. The cubic root of 20346663 is about 273.0011002384.

The spelling of 20346663 in words is "twenty million, three hundred forty-six thousand, six hundred sixty-three".