20685294 has 160 divisors (see below), whose sum is σ = 59590080. Its totient is φ = 5225472.

The previous prime is 20685239. The next prime is 20685307. The reversal of 20685294 is 49258602.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 559044 + ... + 559080.

It is an arithmetic number, because the mean of its divisors is an integer number (372438).

Almost surely, 2^20685294 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20685294, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29795040).

20685294 is an abundant number, since it is smaller than the sum of its proper divisors (38904786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20685294 is a wasteful number, since it uses less digits than its factorization.

20685294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 20685294 is about 4548.1088377478. The cubic root of 20685294 is about 274.5073007106.

The spelling of 20685294 in words is "twenty million, six hundred eighty-five thousand, two hundred ninety-four".