20228916 has 24 divisors (see below), whose sum is σ = 47275200. Its totient is φ = 6732352.

The previous prime is 20228903. The next prime is 20228927. The reversal of 20228916 is 61982202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11785 + ... + 13391.

It is an arithmetic number, because the mean of its divisors is an integer number (1969800).

Almost surely, 2^20228916 is an apocalyptic number.

It is an amenable number.

20228916 is an abundant number, since it is smaller than the sum of its proper divisors (27046284).

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

20228916 is a wasteful number, since it uses less digits than its factorization.

20228916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2663 (or 2661 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 20228916 is about 4497.6567232282. The cubic root of 20228916 is about 272.4734581224.

The spelling of 20228916 in words is "twenty million, two hundred twenty-eight thousand, nine hundred sixteen".