20684702 has 8 divisors (see below), whose sum is σ = 31865736. Its totient is φ = 10062792.

The previous prime is 20684693. The next prime is 20684717. The reversal of 20684702 is 20748602.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139688 + ... + 139835.

It is an arithmetic number, because the mean of its divisors is an integer number (3983217).

Almost surely, 2^20684702 is an apocalyptic number.

20684702 is a deficient number, since it is larger than the sum of its proper divisors (11181034).

20684702 is a wasteful number, since it uses less digits than its factorization.

20684702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279562.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 20684702 is about 4548.0437552864. The cubic root of 20684702 is about 274.5046819440.

The spelling of 20684702 in words is "twenty million, six hundred eighty-four thousand, seven hundred two".