20214481 has 16 divisors (see below), whose sum is σ = 23742720. Its totient is φ = 16853760.

The previous prime is 20214451. The next prime is 20214497. The reversal of 20214481 is 18441202.

It is not a de Polignac number, because 20214481 - 2²³ = 11825873 is a prime.

It is a super-2 number, since 2×20214481² = 817250484198722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20214451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44005 + ... + 44461.

It is an arithmetic number, because the mean of its divisors is an integer number (1483920).

Almost surely, 2^20214481 is an apocalyptic number.

It is an amenable number.

20214481 is a deficient number, since it is larger than the sum of its proper divisors (3528239).

20214481 is an equidigital number, since it uses as much as digits as its factorization.

20214481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624.

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 20214481 is about 4496.0517123361. The cubic root of 20214481 is about 272.4086319386.

Adding to 20214481 its reverse (18441202), we get a palindrome (38655683).

The spelling of 20214481 in words is "twenty million, two hundred fourteen thousand, four hundred eighty-one".