20012240 has 20 divisors (see below), whose sum is σ = 46528644. Its totient is φ = 8004864.

The previous prime is 20012219. The next prime is 20012261. The reversal of 20012240 is 4221002.

It is an interprime number because it is at equal distance from previous prime (20012219) and next prime (20012261).

It can be written as a sum of positive squares in 2 ways, for example, as 7706176 + 12306064 = 2776^2 + 3508^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124997 + ... + 125156.

Almost surely, 2^20012240 is an apocalyptic number.

20012240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012240 is an abundant number, since it is smaller than the sum of its proper divisors (26516404).

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

20012240 is a wasteful number, since it uses less digits than its factorization.

20012240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250166 (or 250160 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 20012240 is about 4473.5042192894. The cubic root of 20012240 is about 271.4971244864.

Adding to 20012240 its reverse (4221002), we get a palindrome (24233242).

The spelling of 20012240 in words is "twenty million, twelve thousand, two hundred forty".