20913204 has 24 divisors (see below), whose sum is σ = 52551520. Its totient is φ = 6434784.

The previous prime is 20913203. The next prime is 20913229. The reversal of 20913204 is 40231902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20913203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66874 + ... + 67185.

Almost surely, 2^20913204 is an apocalyptic number.

It is an amenable number.

20913204 is an abundant number, since it is smaller than the sum of its proper divisors (31638316).

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

20913204 is a wasteful number, since it uses less digits than its factorization.

20913204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134079 (or 134077 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 20913204 is about 4573.0956692376. The cubic root of 20913204 is about 275.5117918368.

The spelling of 20913204 in words is "twenty million, nine hundred thirteen thousand, two hundred four".