20027440 has 20 divisors (see below), whose sum is σ = 46563984. Its totient is φ = 8010944.

The previous prime is 20027437. The next prime is 20027443. The reversal of 20027440 is 4472002.

It is an interprime number because it is at equal distance from previous prime (20027437) and next prime (20027443).

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

It is not an unprimeable number, because it can be changed into a prime (20027443) 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, 125092 + ... + 125251.

Almost surely, 2^20027440 is an apocalyptic number.

20027440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20027440 is an abundant number, since it is smaller than the sum of its proper divisors (26536544).

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

20027440 is a wasteful number, since it uses less digits than its factorization.

20027440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250356 (or 250350 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 20027440 is about 4475.2027887013. The cubic root of 20027440 is about 271.5658442953.

Adding to 20027440 its reverse (4472002), we get a palindrome (24499442).

The spelling of 20027440 in words is "twenty million, twenty-seven thousand, four hundred forty".