20223040 has 28 divisors (see below), whose sum is σ = 48156876. Its totient is φ = 8089088.

The previous prime is 20223037. The next prime is 20223059. The reversal of 20223040 is 4032202.

It can be written as a sum of positive squares in 2 ways, for example, as 15241216 + 4981824 = 3904^2 + 2232^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20223040.

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, 31279 + ... + 31918.

Almost surely, 2^20223040 is an apocalyptic number.

20223040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20223040 is an abundant number, since it is smaller than the sum of its proper divisors (27933836).

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

20223040 is an equidigital number, since it uses as much as digits as its factorization.

20223040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63214 (or 63204 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 20223040 is about 4497.0034467410. The cubic root of 20223040 is about 272.4470732997.

Adding to 20223040 its reverse (4032202), we get a palindrome (24255242).

The spelling of 20223040 in words is "twenty million, two hundred twenty-three thousand, forty".