20929136 has 20 divisors (see below), whose sum is σ = 40827000. Its totient is φ = 10393152.

The previous prime is 20929121. The next prime is 20929141. The reversal of 20929136 is 63192902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2006 + ... + 6773.

It is an arithmetic number, because the mean of its divisors is an integer number (2041350).

Almost surely, 2^20929136 is an apocalyptic number.

It is an amenable number.

20929136 is a deficient number, since it is larger than the sum of its proper divisors (19897864).

20929136 is a wasteful number, since it uses less digits than its factorization.

20929136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8936 (or 8930 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 20929136 is about 4574.8372648653. The cubic root of 20929136 is about 275.5817371161.

The spelling of 20929136 in words is "twenty million, nine hundred twenty-nine thousand, one hundred thirty-six".