20680346 has 8 divisors (see below), whose sum is σ = 31086720. Its totient is φ = 10318108.

The previous prime is 20680339. The next prime is 20680349. The reversal of 20680346 is 64308602.

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

It is not an unprimeable number, because it can be changed into a prime (20680349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9836 + ... + 11751.

It is an arithmetic number, because the mean of its divisors is an integer number (3885840).

Almost surely, 2^20680346 is an apocalyptic number.

20680346 is a deficient number, since it is larger than the sum of its proper divisors (10406374).

20680346 is a wasteful number, since it uses less digits than its factorization.

20680346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22068.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 20680346 is about 4547.5648428582. The cubic root of 20680346 is about 274.4854112394.

Adding to 20680346 its reverse (64308602), we get a palindrome (84988948).

The spelling of 20680346 in words is "twenty million, six hundred eighty thousand, three hundred forty-six".