20896220 has 12 divisors (see below), whose sum is σ = 43882104. Its totient is φ = 8358480.

The previous prime is 20896171. The next prime is 20896243. The reversal of 20896220 is 2269802.

It is a happy number.

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, 522386 + ... + 522425.

It is an arithmetic number, because the mean of its divisors is an integer number (3656842).

Almost surely, 2^20896220 is an apocalyptic number.

20896220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20896220 is an abundant number, since it is smaller than the sum of its proper divisors (22985884).

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

20896220 is a wasteful number, since it uses less digits than its factorization.

20896220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044820 (or 1044818 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 20896220 is about 4571.2383442564. The cubic root of 20896220 is about 275.4371888960.

The spelling of 20896220 in words is "twenty million, eight hundred ninety-six thousand, two hundred twenty".