20929304 has 32 divisors (see below), whose sum is σ = 43813440. Its totient is φ = 9290400.

The previous prime is 20929297. The next prime is 20929331. The reversal of 20929304 is 40392902.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1019 + ... + 6549.

It is an arithmetic number, because the mean of its divisors is an integer number (1369170).

Almost surely, 2^20929304 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20929304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21906720).

20929304 is an abundant number, since it is smaller than the sum of its proper divisors (22884136).

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

20929304 is a wasteful number, since it uses less digits than its factorization.

20929304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5591 (or 5587 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20929304 is about 4574.8556261373. The cubic root of 20929304 is about 275.5824744870.

The spelling of 20929304 in words is "twenty million, nine hundred twenty-nine thousand, three hundred four".