20704624 has 10 divisors (see below), whose sum is σ = 40115240. Its totient is φ = 10352304.

The previous prime is 20704603. The next prime is 20704627. The reversal of 20704624 is 42640702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20704627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 647004 + ... + 647035.

It is an arithmetic number, because the mean of its divisors is an integer number (4011524).

Almost surely, 2^20704624 is an apocalyptic number.

It is an amenable number.

20704624 is a deficient number, since it is larger than the sum of its proper divisors (19410616).

20704624 is a wasteful number, since it uses less digits than its factorization.

20704624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294047 (or 1294041 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 20704624 is about 4550.2334006071. The cubic root of 20704624 is about 274.5927813122.

The spelling of 20704624 in words is "twenty million, seven hundred four thousand, six hundred twenty-four".