20214440 has 32 divisors (see below), whose sum is σ = 45917280. Its totient is φ = 8008512.

The previous prime is 20214437. The next prime is 20214451. The reversal of 20214440 is 4441202.

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 7 ways as a sum of consecutive naturals, for example, 1919 + ... + 6641.

It is an arithmetic number, because the mean of its divisors is an integer number (1434915).

Almost surely, 2^20214440 is an apocalyptic number.

20214440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20214440 is an abundant number, since it is smaller than the sum of its proper divisors (25702840).

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

20214440 is a wasteful number, since it uses less digits than its factorization.

20214440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4841 (or 4837 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 20214440 is about 4496.0471527776. The cubic root of 20214440 is about 272.4084477676.

Adding to 20214440 its reverse (4441202), we get a palindrome (24655642).

The spelling of 20214440 in words is "twenty million, two hundred fourteen thousand, four hundred forty".