20228744 has 16 divisors (see below), whose sum is σ = 38854620. Its totient is φ = 9867520.

The previous prime is 20228743. The next prime is 20228777. The reversal of 20228744 is 44782202.

It can be written as a sum of positive squares in 2 ways, for example, as 20160100 + 68644 = 4490^2 + 262^2 .

It is not an unprimeable number, because it can be changed into a prime (20228743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30509 + ... + 31164.

Almost surely, 2^20228744 is an apocalyptic number.

It is an amenable number.

20228744 is a deficient number, since it is larger than the sum of its proper divisors (18625876).

20228744 is a wasteful number, since it uses less digits than its factorization.

20228744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61720 (or 61716 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 20228744 is about 4497.6376021196. The cubic root of 20228744 is about 272.4726858687.

The spelling of 20228744 in words is "twenty million, two hundred twenty-eight thousand, seven hundred forty-four".