20329684 has 12 divisors (see below), whose sum is σ = 35929908. Its totient is φ = 10064000.

The previous prime is 20329681. The next prime is 20329693. The reversal of 20329684 is 48692302.

It can be written as a sum of positive squares in 2 ways, for example, as 17405584 + 2924100 = 4172^2 + 1710^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20329681) 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, 24757 + ... + 25564.

It is an arithmetic number, because the mean of its divisors is an integer number (2994159).

Almost surely, 2^20329684 is an apocalyptic number.

It is an amenable number.

20329684 is a deficient number, since it is larger than the sum of its proper divisors (15600224).

20329684 is a wasteful number, since it uses less digits than its factorization.

20329684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50426 (or 50424 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 20329684 is about 4508.8450849414. The cubic root of 20329684 is about 272.9251405976.

The spelling of 20329684 in words is "twenty million, three hundred twenty-nine thousand, six hundred eighty-four".