20910496 has 24 divisors (see below), whose sum is σ = 42958944. Its totient is φ = 10000320.

The previous prime is 20910481. The next prime is 20910497. The reversal of 20910496 is 69401902.

It is a happy number.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20910497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13470 + ... + 14941.

It is an arithmetic number, because the mean of its divisors is an integer number (1789956).

Almost surely, 2^20910496 is an apocalyptic number.

It is an amenable number.

20910496 is an abundant number, since it is smaller than the sum of its proper divisors (22048448).

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

20910496 is a wasteful number, since it uses less digits than its factorization.

20910496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28444 (or 28436 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 20910496 is about 4572.7995801259. The cubic root of 20910496 is about 275.4998995392.

The spelling of 20910496 in words is "twenty million, nine hundred ten thousand, four hundred ninety-six".