20339684 has 12 divisors (see below), whose sum is σ = 37688364. Its totient is φ = 9571584.

The previous prime is 20339681. The next prime is 20339717. The reversal of 20339684 is 48693302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10099684 + 10240000 = 3178^2 + 3200^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20339681) 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, 149489 + ... + 149624.

It is an arithmetic number, because the mean of its divisors is an integer number (3140697).

Almost surely, 2^20339684 is an apocalyptic number.

It is an amenable number.

20339684 is a deficient number, since it is larger than the sum of its proper divisors (17348680).

20339684 is a wasteful number, since it uses less digits than its factorization.

20339684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299134 (or 299132 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 20339684 is about 4509.9538800303. The cubic root of 20339684 is about 272.9698831201.

The spelling of 20339684 in words is "twenty million, three hundred thirty-nine thousand, six hundred eighty-four".