20442260 has 12 divisors (see below), whose sum is σ = 42928788. Its totient is φ = 8176896.

The previous prime is 20442203. The next prime is 20442269. The reversal of 20442260 is 6224402.

It can be written as a sum of positive squares in 2 ways, for example, as 5216656 + 15225604 = 2284^2 + 3902^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1022113 = 20442260 / (2 + 0 + 4 + 4 + 2 + 2 + 6 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442269) 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, 511037 + ... + 511076.

It is an arithmetic number, because the mean of its divisors is an integer number (3577399).

Almost surely, 2^20442260 is an apocalyptic number.

20442260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20442260 is an abundant number, since it is smaller than the sum of its proper divisors (22486528).

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

20442260 is a wasteful number, since it uses less digits than its factorization.

20442260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022122 (or 1022120 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 20442260 is about 4521.3117565592. The cubic root of 20442260 is about 273.4279895577.

Adding to 20442260 its reverse (6224402), we get a palindrome (26666662).

It can be divided in two parts, 20442 and 260, that added together give a palindrome (20702).

The spelling of 20442260 in words is "twenty million, four hundred forty-two thousand, two hundred sixty".