20002240 has 28 divisors (see below), whose sum is σ = 47631096. Its totient is φ = 8000768.

The previous prime is 20002201. The next prime is 20002261. The reversal of 20002240 is 4220002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 30934 + ... + 31573.

Almost surely, 2^20002240 is an apocalyptic number.

20002240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002240 is an abundant number, since it is smaller than the sum of its proper divisors (27628856).

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

20002240 is an equidigital number, since it uses as much as digits as its factorization.

20002240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62524 (or 62514 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 20002240 is about 4472.3863876011. The cubic root of 20002240 is about 271.4518951070.

Adding to 20002240 its reverse (4220002), we get a palindrome (24222242).

The spelling of 20002240 in words is "twenty million, two thousand, two hundred forty".